Physics p3 Experiment
description
Transcript of Physics p3 Experiment
Physics Paper 3 - Section B
1
SPM 2011
MODUL LATIHAN BERSEPADU
PHYSICS 4531/3
Complied by :-
EN ADNAN SHAMSUDIN
GURU CEMERLANG FIZIK
Dengan Kerjasama :-
PANITIA FIZIK
SMK SULTAN ISMAIL JOHOR BAHRU.
PAPER 3
Marking Scheme Included
Physics Paper 3 - Section B
2
CHAPTER 2
1. Diagram 3 shows two catapults A and B made from same
catapult rubber. Difference forces are applied on the
catapults.
Base on the information and observation above:
(a) State one suitable inference.
[1 mark]
(b) State one suitable hypothesis.
[1 mark]
(c) With the use of apparatus such as spring, retort stands
and other apparatus, describe an experiment framework
to investigate the hypothesis stated in 3(b).
(i) The aim of the experiment
(ii) The variables in the experiment
(iii) The list of apparatus and materials
(iv) The arrangement of the apparatus
(v) The procedure of the experiment.
(vi) Describe how to control the manipulated variables
and how to measure the responding variables.
(vii) The way to tabulate the data.
(viii) The way to analyse the data
[10 marks]
2. A boy pushes the boxes along a level walkway as shown in
Diagram 3.1. The boy experiences that the boxes on trolley
move slowly. When the boy removes two of the boxes as
shown in Diagram 4.2, he experiences that the trolley move
faster than before although the same force was applied, 8 N.
Based on the information and obsevation above :
(a) State one suitable inference.
[1 mark]
(b) State one suitable hypothesis.
[1 mark]
(c) With the use of apparatus such as a trolley, ticker timer,
ticker tape, elastic cord and other apparatus, describe an
experiment framework to investigate the hypothesis
stated in 4(b). In your description, state clearly the
following :
(i) The aim of the experiment
(ii) The variables in the experiment
(iii) The list of apparatus and materials
(iv) The arrangement of the apparatus
(v) The procedure of the experiment.
(vi) Describe how to control the manipulated variables
and how to measure the responding variables.
(vii) The way to tabulate the data.
(viii) The way to analyse the data
[10 marks]
CHAPTER 3
3. A man who is fishing, pulled out a fish out of the water as
shown in Diagram 3.1. It becom es more difficult to pull out
the fish out of the water and the rod is getting bender in
Diagram 3.2.
Diagram 3.1 Diagram 3.2
Based on the information and your observation above:
(a) State one suitable inference.
(b) State one suitable hypothesis.
(c) With the use of apparatus such as measuring cylinder,
spring balance, metal rod and other apparatus, describe
an experiment framework to investigate the hypothesis
stated in 3(b)
4. Diagram 3.1 shows a diver is diving into the sea. Diagram
3.2 shows a diver is diving into the swimming pool. They are
at the same depth but the diver in Diagram 3.1 feel that his
ear was sick.
Diagram 3.1 Diagram 3.2
Based on the observation above and your knowledge of
pressure in liquid;
(a) State one suitable inference.
(b) State one suitable hypothesis.
(c) With the use of apparatus such as thistle funnel, meter
ruler and others, describe an experiment framework to
investigate the hypothesis stated in 4(b)
Physics Paper 3 - Section B
3
5. Diagram 3.1 shows an aluminium foil which has been shaped
into a boat and put into a water container. Diagram 3.2 shows
the same piece of aluminium foil that has been crumpled and
put into the same water container.
Based on the above information and observation:
(a) State one suitable inference.
(b) State one suitable hypothesis.
(c) With the use of apparatus such as a measuring cylinder, a
metal rod, spring balance and other apparatus, describe
an experiment to investigate the hypothesis stated in 3(b).
CHAPTER 4
6. Diagram 3.1 shows a half glass of hot coffee that is left for
ten minutes. Diagram 3.2 shows a full glass of similar hot
coffee that is left for the same time. It is notice that the hot
coffee in Diagram 3.1 cools down faster than Diagram 3.2.
Diagram 3.1 Diagram 3.2
Based on the information and observation above:
(a) State one suitable inference.
(b) State one suitable hypothesis.
(c) With the use of apparatus such as immersion heater,
beaker and other apparatus, describe an experiment
framework to investigate the hypothesis stated in 3(b).
7. Diagram 3.1 shows a worker pushing down on the piston of a
clogged bicycle pump. Diagram 3.2 shows the same worker
finding it harder to push the piston further down.
Based on the information and observation:
(a) State one suitable inference
(b) State one suitable hypothesis
(c) With the use of apparatus such as a Bourdon gauge and
the other apparatus, describe an experiment to investigate
the hypothesis stated in 3(b).
8. Before going to Johor Bahru, Afiff measures the air pressure
of the tyres of his car, as shown in Diagram 3. He noticed
that the air pressure one of the tyres is 200 kPa. At Johor
Bahru, Afiff measured the air pressure. He found that the air
pressure in tyre has increased to 240 kPa. Afiff also found
that the tyre become hot after he arrived at Johor Bahru.
However the size of the tyre remains the same.
Based on the information and observation:
(a) State one suitable inference
(b) State one suitable hypothesis.
(c) With the use of apparatus such as Bourdon gauge, a
round bottom flask and other apparatus, describe one
experiment to investigate the hypothesis stated in
Question 3(b).
Physics Paper 3 - Section B
4
9. Diagram 3.1 shows an inverted beaker contains an air
trapped is converted and immersed in the water. Diagram 3.2
shows the volume of air trapped in the beaker decreased
when the beaker is pushed down in the water.
Based on your observation on the volume of air trapped in
the beaker;
(a) State one suitable inference,
(b) State one appropriate hypothesis that could be
investigated,
(c ) With use of apparatus such as a syringe , thick rubber
tube and other apparatus, describe an experiment to
investigate the hypothesis stated in 3(b)
10. Diagram 3.1 shows two pot, X and Y, with X containing more
water than Y. Both the pot are heated. After a few minutes it
was observed that the water in pot Y is hotter than the water
in pot X.
Diagram 3.1
Based on the information and observation:
(a) State one suitable inference
(b) State one suitable hypothesis.
(c) With the use of apparatus such as beaker, thermometer
immersion heater and other apparatus, describe one
experiment to investigate the hypothesis stated in
Question 3(b).
11. Diagram 3.1 shows a boy accidentally spilt a few drops of
hot noodle soup onto his hand and felt slight pain. Later on,
he accidentally spilt the whole bowl of hot noodle soup onto
Diagram 3.1 Diagram 3.2
Based on the information and observation:
(a) State one suitable inference.
(b) State one hypothesis that could be investigated
(c) With the use of apparatus such as power supply, beaker,
immersion heater and other apparatus, describe an
experiment to investigate the hypothesis stated in
Question 3(b).
CHAPTER 5
12. Diagram 3.1 shows a student using a convex lens to form a
sharp image of a lamp at the ceiling. Diagram 3.2 shows the
student using another convex lens to form a sharp image of
the lamp.
Diagram 3.1 Diagram 3.2
Observe the thickness of the lens and the distance from the
lens to the image in both situations.
Based on the observation:
(a) State one suitable inference.
(b) State one hypothesis that could be investigated.
(c) With the use of apparatus such as convex lenses, a screen
and other apparatus, describe an experiment to
investigate the hypothesis stated in 3(b).
13. Diagram 3.1 shows a line under a glass block. Diagram 3.2
shows an identical line under a Perspex block of the same
size. An observer noticed that the image of the line formed in
the glass block is nearer to the surface of the block.
Based on the information and observation:
(a) State one suitable inference,
(b) State one hypothesis that could be investigated.
(c) With the use of apparatus such as a tall beaker, water and
other apparatus and material, describe one experiment to
investigate the hypothesis stated in 3(b).
Physics Paper 3 - Section B
5
CHAPTER 6
14. Diagram 4.1 shows a boy standing beside the road and a
motorcycle moving towards the boy from a far distance.
Diagram 4.2 shows that the boy has to close his ears when
the motorcycle has come nearer to him.
Diagram 4.1
Diagram 4.2
Based on the information and observation:
(a) State one suitable inference.
(b) State one hypothesis that could be investigated.
(c) With the use of apparatus shown in Diagram 4.3 and
other apparatus, describe an experiment to investigate the
hypothesis stated in 4(b).
15. Diagram 4.1 and diagram 4.2 shows the interferance
patterns formed by two continuous coherent water waves
with different distance between two spherical dippers.
Based on the information and the observation above:
(a) State one suitable inference
(b) State one suitable hypothesis.
(c) With the use of apparatus such as ripple tank,
stroboscope and other suitable apparatus, describe an
experiment framework to investigate the hypothesis
stated in 4(b).
16. Diagram 4 shows a man testing a newly bought audio system
in a mini theatre by changing his seating position. Loud
sound can only be obtained at some seating positions with a
certain distance from the loudspeaker.
Physics Paper 3 - Section B
6
Based on the observation above and your knowledge on
waves phenomena;
(a) State one suitable inference.
(b) State one hypothesis that could be investigated.
(c) With the use of apparatus such as an audio
generator, loudspeakers and other apparatus, describe an
experimental framework to investigate the hypothesis
stated in 3(b).
17. Diagram 4 shows two audio technicians is going to set a
close hall so that the audient can enjoy the sound perform by
a singer clearly. When the workers bring the two speakers
closely to another, the distance beside two chairs must be set
further apart so that the sound effect is good enough. The
works can be illustrated as shown in the Diagram 4.
Based on the situation above,
(a) State one suitable inference.
(b) State one hypothesis that could be investigated.
(c) With the use of apparatus such loudspeakers, audio
signal generator and others to set your apparatus,
describe an experiment framework to investigate the
hypothesis stated in 3(b).
CHAPTER 7
18. Diagram 4.1 shows a worker lifting a load using a reel and a
pulley. The worker notices that it takes a longer time to lift a
heavier load to the top of the building.
Diagram 4.1
Based on the situation above,
(a) State one suitable inference.
(b) State one appropriate hypothesis that could be
investigated.
(c) With the use of apparatus such as d.c. motor (12V),
slotted weight and others apparatus, describe an
experiment to investigate the hypothesis stated in 4(b).
19. Diagram 4.1 and Diagram 4.2 show an identical bulbs
connected to the conductor wires of identical length but of
different thickness. When the power supply is switched on,
the bulbs lighted with different brightness.
(a) State one suitable inference
(b) State one hypothesis that could investigated.
(c) With the use of apparatus such as a dry cells, constantan
wire and other apparatus, describe one experiment to
investigate the hypothesis stated in 4(b).
20. Diagram 4.1 shows a lamp which lights up with normal
brightness when the dimmer knob is set at its minimum
value. Diagram 4.2 shows the lamp dimmer when the
dimmer knob is set at its maximum value.
Physics Paper 3 - Section B
7
Diagram 4.1 Diagram 4.2
Based on the information and observation:
(a) State one suitable inference
(b) State one suitable hypothesis
(c) With the use of apparatus such as constantan wire ,
voltmeter and the other apparatus, describe an
experiment to investigate the hypothesis stated in 3(b).
21. Diagram 4.1 shows Aminah ironing her school uniform.
After the iron is switched on for a while, there are still
wrinkles on the uniform. Diagram 4.2 shows that the
wrinkles are gone when the temperature control knob as
shown in figure 4.3 on the iron is turned.
Based on the observation on Diagram 4.1, Diagram 4.2 and
Diagram 4.3 and using your knowledge of the effect of
current on heating:
(a) State one suitable inference
(b) State one suitable hypothesis
(c) With the use of apparatus such as beaker, an ammeter,
an immersion heater and the other apparatus, describe
an experiment to investigate the hypothesis stated in
3(b).
22. Diagram 4.1 and Diagram 4.2 show two night market stalls
which are fixed with two identical bulbs that are connected to
two identical car batteries 12 V with different length of
connecting wires. Both bulbs bright up with different
brightness.
Based on the information and observation:
(a) State one suitable inference.
(b) State one hypothesis that could be investigated
(c) With the use of apparatus such as dry cells, constantan
wire, and other apparatus, describe an experiment to
investigate the hypothesis stated in 4(b).
23. Diagram 4.1 and 4.2 shows the electric circuit consists with
an electric bells, switch and battery. When the switch is
closed, it is observes that the bell in Diagram 4.2 rings louder
than the bell in Diagram 4.1. Both electric bells in each
diagram are same.
Based on the observation above and your knowledge of
electromagnet;
(a) State one suitable inference.
(b) State one suitable hypothesis.
(c) With the use of apparatus such as solenoid, paper clips
and othersdescribe an experiment framework to
investigate the hypothesis stated in 4(b)
Physics Paper 3 - Section B
8
24. Diagram 4.1 and 4.2 show the electric bell which is
connected to the similar batteries.
When the switch is on, the bell in figure 4.2 ring loudly than
the bell in figure 4.1.
Based on your observation
(a) State one suitable inference
(b) State one appropriate hypothesis that could be
investigated
(c ) With use of apparatus such as a insulated copper wire ,
small iron pins and other apparatus, describe an
experiment to investigate the hypothesis stated in 3(b)
25. Diagram 4.1 shows an electromagnetic lifting machine used
to lift scrap metal. Diagram 4.2 shows the observation of the
machine when the current flows through the machine is
increased.
Base on the information and observation above:
(a) State one suitable inference.
(b) State one suitable hypothesis.
(c) With the use of apparatus such as copper wire, soft iron
core and other apparatus describe an experiment
framework to investigate the hypothesis stated in 4(b).
26. Diagram 4.1 shows a cross-section of a bicycle dynamo
which has a magnet and coil of insulated copper wire. The
output of the dynamo is connected to a bicycle lamp. The
lamp will light up when the magnet is rotated by turning the
wheel. The light gets brighter when the wheel turns faster.
Based on the above information and observation:
(a) State one suitable inference.
(b) State one hypothesis that could be investigated.
(c) With the use of apparatus such as coil of copper wire,
galvanometer, crocodile clips and other apparatus,
describe an experiment to investigate the
hypothesis stated in 4(b).
MARKING SCHEME PHYSICS PAPER 3-SECTION B
CHAPTER 2
Questions No. 1
(a) The length of catapult rubber depends on the force
(b) The bigger the force, the longer the extension of the catapult
rubber
(c) To investigate the relationship between the force and extension
of a spring
- Manipulated variable : Force
- Responding variable : Extension
- Constant variable : Length of the spring//diameter of the
spring//type of spring
- Spring, retort stand, ruler, slotted weight
- State a functionable arrangement of the apparatus
- Measure the initial length of the spring, l1
- Put one slotted mass, 20 g/m1 at the end of the spring.
- Measure the length of the spring, l2
- Calculate extension of the spring, x = l2 – l1
- Repeat the experiment for the mass 40g, 60g, 80g, 100g.
- Tabulate the data
- Plot graph of extension /length of spring against
force/mass
Questions No. 2
(a) Acceleration is influenced by the mass
(b) When the mass increased, the acceleration will be decreased.
(c) (i) To investigate the relationship between the acceleration
and the mass.
(ii) Manipulated variable : mass
Responding variable : acceleration
Constant : Force applied
(iii) 5 Trolleys, ticker timer, ticker tape, a rubber band, a
wooden runway, 12 V a.c power supply, ruler
(iv)
(v) The ticker-timer is switched on and a trolley (of 1 kg) is
pulled using a rubber band. The extension of the rubber
band is ensured to be of the same length
Acceleration of the trolley is calculated using the ticker-
tape. a = ( v-u ) / t
Procedure 2 and Procedure 3 are repeated using 2, 3, 4
and 5 trolleys
(vi)
(vii)
CHAPTER 3
Questions No. 3
(a) The buoyant force can be determined by finding the weight of
water displaced
(b) The more the rod is immersed, the lower the reading on the
spring balance
(c) (i) To investigate the relationship between weight of water
displaced and the buoyant force
(ii) Manipulated : length of rod below the liquid level
Responding : weight/ loss in weight
Constant : Density of liquid
(iii) Beaker, rod, spring balance, metre rule
(iv)
(v) A rod which is 10 cm long is marked at intervals of 1 cm
and suspended from the hook of a spring balance.
The experiment is started by lowering the rod to depth of
5.0 cm and reading on the spring balance, W is recorded.
The length of rod below the liquid level is measured and
the reading on the spring balance is recorded.
The experiment is repeated by lowering the rod to
different depths, i.e,H = 6.0 cm, 7.0 cm, 8.0 cm and 9.0
cm
(vi) Tabulate the data :
(vii)
Questions No. 4
(a) The density of the water affects the pressure
(b) As the density increase , the different level/pressure increase.
(c) (i) To investigate the relationship between the density of
liquid and the pressure/ different level.
(ii) MV : density
RV : pressure //different level
CV : Depth
(iii) Tall beaker, small thistle funnel, flexible tube,
manometer, meter rule, retort stand, liquids
(iv)
(v) Insert the thistle funnel vertically down to the bottom
of the beaker of liquid density of 1.2 gcm-3
Measure the different level in manometer, l.
Repeat the experiment 4 time using another liquid
with different density such as 1.5 gcm-3. 2.0 gcm-3,
3.0 gcm-3 3.5 gcm-3 and 4.0 gcm-3
(vi) Record the data
(vii) Plot graph pressure against density.
Questions No. 5
(a) The different shape of platisicine , give different buoyant force
(b) When the surface area increase, the buoyant force increase
(c) Aim of experiment : To determine the buoyant force acting on
an object in different states of flotation
(i) Manipulated variable:Height of the iron bar
(ii) Responding variable:Reading of the spring balance
(iii) Fixed/ constant variables:Volume of the water
(iv) List of apparatus and materials Measuring cylinder, a
metal rod, spring balance and metre rule, beaker, water,
retord stand
(v) Arrangement of apparatus
(vi) Procedure
- The meter rule was clipped to the retort stand
beside of the iron bar.
- The height of the iron bar is set at h = 20.0 cm.
- The iron bar is immersed into the water. The
reading of the spring balance is recorded. 4. Step 2
and 3 is repeated for the height, h= 25.0 cm,
30.0cm, 35.0 cm and 40.0 cm.
(vii) Tabulation of data
(viii) Analysis of data: Draw a graph of weight, W against height, h
CHAPTER 4
Questions No. 6
(a) The change in temperature of water depends on its volume /
mass
(b) When the volume / mass increases, change in temperature
decreases
(c) (i) To investigate the relationship between the volume /
mass and temperature
(ii) Manipulated variable : volume / mass of water
Responding variable : change in temperature
Fixed variable : heating time
(iii) Power supply, immersion heater, connecting wires,
beaker, stirrer, thermometer, water, measuring cylinder /
balance , heater and stop watch
(iv)
(v) 20 cm3//g of water is heated by an immersion heater for 5
minutes.
Final temperature is recorded after 5 minutes.
Repeat step 1 and 2 using 40 cm3, 60 cm3, 80 cm3 and
100 cm3 of water
(vi)
(vii)
Questions No. 7
(a) The force // weight affects the volume of the gas
The pressure affects the volume of the gas
(b) When the pressure of a fixed mass of gas decreases , the
volume of the gas increases//The bigger the acting force the
smaller the volume of the gas // The bigger the acting force the
smaller the volume of the gas // The greater the weight the
smaller the volume of the gas.
(c) (i) To investigate the relationship the pressure and the
volume of the gas
(ii) MV : Pressure of gas , V
RV : Volume of gas , P
CV: Temperature and mass of the gas.
(iii) 100 cm3 glass syringe , rubber tube , Bourdon gauge ,
load, triple beam balance , retort stand.
(iv)
(v) Weight is added onto the piston until the Bourdon
gauge shows a reading 10 Pa
Record the enclosed volume, V , of the syringe
Repeat the experiment by increasing the pressure to
15 Pa , 20 Pa, 25 Pa and 30 Pa.
(vi) Tabulate the data.
(vii) Plot graph V against P.
Questions No. 8
(a) Pressure depends on temperature
(b) The higher the temperature, the higher the pressure
(c) (i) To investigate the relationship between the air pressure
and its temperature
(ii) Manipulated : temperature
Responding : pressure
Fixed : volume / mass of gas
(iii) Round-bottomed flask, glass tube, bourdon gauge,
thermometer, rubber tube, retort stand, tripod stand,
Bunsen burner, stirrer, beaker, wire gauze, water, water
bath.
(iv)
(v) - Read thermometer when the temperature reach
30°C.
- At the same time, read the bourdon gauge to get
the reading of gas pressure.
- Stir the water continuously, and repeat the
experiment when the temperature reach 40°C,
50°C, 60°C and 70°C.
(vi) Tabulate the data
(vii) Plot the graph pressure against temperature
Questions No. 9
(a) Pressure depends on volume// Volume influences pressur
(b) When the volume decrease , the pressure increase ,
(c) To investigate the relationship between volume and pressure
(i) Manipulated : volume
(ii) Responding : pressure
(iii) Fixed : mass of gas // temperature
(iv) Syringe, clip , thick rubber tube, bourdon gauge .
(v) The piston of the 100 cm-3 syringe is adjusted until the
volume of air in the syringe at atmospheric pressure.The
other end of the rubber tube is connected tppo bourdon
gauge and the pressure of the air in the syringe is read
on the gauge.
The piston of the syringe is pushed in until the enclosed
volume is 98 cm3 / V1.
The pressure on the Bourdon gauge is recorded.
The steps is repeated for an enclosed volume of 96 cm3/V2,
94 cm3/V3, 92cm3/V4, 90 cm3/V5
Questions No. 10
(a) The mass // volume affects the rise in temperature //
temperature
(b) The greater the mass // volume, the smaller the rise in
temperature // temperature
(c) (i) To investigate the relationship between the mass and rise
in temperature (of water)
(ii) Manipulated variable : Mass
Responding variable : Increase in temperature
Fixed variable : Heat supplied // Time of heating // Power
of the heater
(iii) Beaker, water, thermometer, immersion heater,
stopwatch, balance for measuring mass
(iv) Draws a labeled and functional diagram of the set up of
the apparatus
(v) Put a mass of 100 g of water in a beaker
Switch on the heater for 5 minutes and record the
temperature rise
Repeat the experiment with 150 g, 200 g, 250 g and, 300
g of water.
(vi) Tabulate the data
(vii) The graph of temperature rise against mass is drawn
Questions No. 11
(a) The heat/ time taken of the water depends on its mass/volume
(b) The greater the mass/volume, the time taken increase
(c) (i) To investigate the relationship between the time taken
and mass/volume
(ii) Manipulated variable : mass/volume
Responding variable : Time taken
Constant variable : Initial temperature/specific heat
capacity/ changes in temperature
(iii) Power supply, thermometer, beaker, immersion heater,
stirrer
(iv)
(v) The 20 g of water is filled in the beaker.
The initial temperature, Ө0, of water is recorded.
The heater is switched on until the water boiled.
The time taken for the water is observed and recorded/
The heat is calculated.
Repeat with masses of boiling water 40 g, 60 g, 80 g and
100 g.
(vi) Tabulate the table
(vii)
CHAPTER 5
Questions No. 12
(a) To investigate the relationship between the thickness of the lens
and the distance from the lens to the screen / focal length
(b) The greater the thickness of the lens, the smaller the distance
from the lens to the screen / focal length
(c) (i) To investigate the relationship between the
thickness of the lens and the distance from the lens to the
screen / focal length
(ii) Manipulated variable : Thickness of the lens
Responding variable : distance from the lens to
the screen focal length / f
(Note: Constant variable can be ignored)
(iii) Convex lenses, screen, metre rule, lens holder
(iv)
(v) A convex lens with thickness 0.4 cm is placed in front of
a screen
The screen is adjusted until a sharp image of a distant
object is obtained and the distance between the lens and
the screen is measured.
The previous steps are repeated using convex lenses of
thickness 0.6 cm, 0.8 cm, 1.0 cm and 1.2 cm
(vi)
(vii) The graph f agianst d is plotted
Questions No. 13
(a) Apparent depth depends on the density/type of block/material
(b) When the density (of material) increase, the apparent depth
decrease/depth of image
(c) (i) To investigate the relationship between density and
apparent depth/depth of the image
(ii) manipulated V : density// mass of salt
responding V : apparent depth/depth of image
fixed V : real depth , volume water(ignore the change
of volume of water + salt )
(iii) Tall Beaker/cylinder, pin, retort stand, water, salt, meter
rule, triple beam balance
(iv)
(v) Fill the beaker with ( V = 1000 cm3 ) water.
Put the 20 g of salt into the beaker and stir .
Place a pin O into the water.
Adjust the position of the pin I (at the retort stand) by
observing above the beaker until it appears in line with
the image
Measure the apparent depth of the straight line,d.
Repeat the experiment with( different four densities of
liquids) by mixing the mass of salt , m = 30g , 40g, 50g,
and 60g .
(vi)
(vii)
CHAPTER 6 Questions No. 14
(a) The loudness of the sound depends on the distance (between
the source and the observer
(b) The smaller the distance (between the source and the observer),
the louder the sound
(c) (i) To investigate the relationship between the loudness of a
sound and the distance (between the source and the
observer)
(ii) Manipulated variable : distance, d
Responding variable : loudness of sound (amplitude,
a)
(Note: Constant variable can be ignored)
(iii) Audio signal generator, loudspeaker, cathode ray
oscilloscope (CRO), microphone, meter rule / measuring
tape
(iv)
(v) The microphone is placed at a distance, d = 20.0 cm from
the loudspeaker
The amplitude, a, of the trace on the screen of the is
measured.
The procedure was repeated for the values of distance, d
= 30.0 cm, 40.0 cm, 50.0 cm and 60.0 cm
(vi)
(vii) A graph of a against d is drawn
Questions No. 15
(a) The distance between two spherical dippers affects the distance
between two constructive/destructive interference.
(b) The distance between two constructive/destructive interferente
decrease when the distance between 2 spherical dippers.
(c) (i) To investigate the relationship between the distance
between 2 spherical dippers and the distance beteen 2
constructive /destructive interference.
(ii) Mv : The distance between 2 spherical dippers
Rv : the distance between 2 constructive /destructive
interference.
Fv: Depth of the water// speed of the motor// the
perpendicular distance between the 2 spherical dippers
and the place where the interference pattern is observed.
(iii) Ripple tank, power supply, white paper and ruler
(iv)
(v) Two spherical dippers are attached to the water
The distance between spherical dippers on the screen are
adjusted to a = 5.0cm
The distance between 2 constructive /destructive
interference on the scree n , x is measured with the ruler
and
Repeat the previous step by increasing the distance
between 2 spherical recorded. dippers. a =6cm,7cm,8cm
and 9cm.
(vi)
(vii)
Questions No. 16
(a) The distance between two successive loud, x sound depends on
the distance from the loudspeakers, D
(b) The distance between two loud sounds, x increases as the
distance of separation of two sources, a increases.
/ the longer the distance between two loud sounds, x ,the longer
the distance from the loudspeakers, D
(c) (i) To investigate the relationship between distance, x and
distance, D
(ii) Manipulated : Distance between the observer and
loudspeakers, D
Responding : Distance between two successive positions
of loud sounds, x.
Fixed : Distance between the two loudspeaker, a,
frequency of audio generator
(iii) Audio signal generator, two identical loudspeakers,
connecting wires and metre ruler
(iv)
(v) Setting up of apparatus is as shown in diagram above.
Switch on the audio generator.
A student walked slowly along a parallel straight line
at a distance, D = 5.0 m from the loudspeakers using a
metre rule /measuring tape.
The distance, x between two successive positions of loud
sounds is measured using a metre rule.
The experiment is repeated for D = 1.0m, 1.5 m, 2.0 m,
2.5 m and 3.0m.
(iii) Tabulate the data
(vii) Plot the graph x against D
Questions No. 17
(a) The distance between 2 loud speaker affect the distance
between 2 loud or soft sound
(b) When the distance between two coherent sources of sound is
increase, the distance between two consecutive constructive or
destructive interference is decrease.
(c) (i) To investigate the relationship between two coherent
sources and the distance between two consecutive
constructive and destructive interference.
(ii) Manipulated : Distance between two coherent sources, a
Responding : Distance between two consecutive
constructive or destructive Interference,x
Constant : Distance between the source and the screen.
(iii) Loud speaker, audio signal/frequency generator,
connection wire, power supply, measuring tape.
(iv)
(v) By using a metre rule the distance between the listener
from the loudspeaker is measured= D
The audio-frequency generator is switched on.
Use a distance between two loud speaker, a= 1.0m.
The listener is requested to walk in a straight path from
left to right.
The distance between two successive loud regions is
measured by a metre rule = x
The experiment is repeated using a distance between two
loud speaker a=1.5m, 2.0m, 2.5m and 3.0m.
(vi) Tabulate the data
(vii)
CHAPTER 7
Questions No. 18
(a) The time to reach the top depends on the mass //
The current supply depends on the mass
(b) When the mass increases, time / current increases
(c) (i) To investigate the relationship between the mass and time
/ current
(ii) Manipulated variable : mass
Responding variable : time / current
Fixed variable : height
(iii) Battery / DC power supply, slotted mass, connecting
wires, 12V DC motor, pulley
(iv)
(v) 20 g of slotted mass is lifted by a motor to a height of 1
m.
The time taken to reach the top is recorded // The
ammeter reading is recorded.
Repeat step 1 and 2 using 40 g, 60 g, 80 g and 100 g of
slotted mass
(vi)
(vii)
Questions No. 19
(a) Resistance// brightness of bulb depends on the
diameter/thickness of the conductor wire
(b) When the diameter/thickness increase, the resistance decrease
(c) (i) To investigate the relationship between the diameter
/thickness of the conductor wire and resistance
(ii) Manipulated : diameter / thickness
Responding : resistance / voltage
Constant : length of conductor
(iii) Dry cells, insulated constantan wire, connector wire,
ammeter, voltmeter, rheostat , switch, meter rule
(iv)
(v) A 20 cm length of constantan wire of diameter of 0.1
mm is connected to a circuit as shown in diagram above.
Adjust the rheostat and until the ammeter reading is I =
(0.2A). Measure the corresponding reading on the
voltmeter, V
Calculate the resistance of conductor using equation;
R = V/I
Repeat the experiment with the diameter of constantan
wire , 0.2 mm , 0.3 mm, 0.4mm and 0.5mm.
(vi)
(vii)
Questions No. 20
(a) The brightness // dimness of bulb is affected by the length of
wire
(b) The longer the wire , the higher the resistance // the smaller the
current
(c) (i) To investigate the relationship between the length of wire
and the resistance // the current flow
(ii) MV : length of wire,l
RV : resistance ,R // Current ,I
CV : diameter of wire // thickness of wire // cross
sectional area of wire // temperature of wire
(iii) Ammeter , voltmeter , rheostat , constantan wire , dry
cells , meter ruler , connecting wire
(iv)
(v) Measure the length of a constantan wire with a ruler , l =
10 cm
The switch is on and adjust rheostat until ammeter
reading shows current , I = 0.5 A
Record the potential difference from voltmeter , V
Calculate the resistance , R = V / I
Repeat the experiment by using constantan wire of l =
15.0 cm, 20 cm , 25 cm , 30 cm and 35.0 cm.
(vi) Tabulate the data
(vii) Plot the graph R against l
Questions No. 21
(a) The heating effect of a conductor is affected by magnitude of
the current.
(b) The larger the current, the higher the temperature of the water
which is being heated
(c) (i) To investigate the effect of current on heating
(ii) MV : current ,I
RV : temperature , θ
CV : volume of water
(iii) Beaker, ammeter, immersion heater, thermometer,
connecting wire, rheostat and stop watch
(iv) Draws a labeled and functional diagram of the set up of
the apparatus.
(v) Pour 200cm3 of water into the beaker and measure its
temperature.
Switch on the circuit and adjust the rheostat until the
reading of ammeter is 1.0 A.
The stop watch is started.
The final temperature is recorded after 2 minutes.
Step repeated by adjusting the rheostat so that the
ammeter readings are 2.0 A, 3.0 A, 4.0 A and 5.0 A.
(vi) Tabulate the data
(vii) The graph of increased in temperature against current is
drawn
Questions No. 22
(a) The length of wire affects the resistance/current
(b) The shorter the wire, the higher the current/the resistance is
decrease
(c) (i) To investigate the relationship between the length of wire
and current/resistance
(ii) Manipulated variable : length
Responding variable : Current/Resistance
Constant variable : Potential
difference/Temperature/Diameter
(iii) Ammeter, voltmeter, dry cells, constantan wires, ruler
(iv)
(v) The length of wire is measured at 10 cm.
The current is observed and recorded using the ammeter/
The resistance is calculated.
Repeat with different lengths of 20 cm, 30 cm, 40 cm
and 50 cm.
(vi) Tabulate the data
(vii)
CHAPTER 8
Questions No. 23
(a) The electric current affects the loudness of the bell //
The loudness of the bell depends on the electric current
(b) The strength of an electromagnet increases as the current
increases
(c) (i) To investigate the relationship between electric current
and the strength of an electromagnet
(ii) Manipulated variable : electric current
Responding variable : strength of an electromagnet
Constant variable : number of turn solenoid // soft iron
core
(iii) Ammeter, connection wires, rheostat, retort stand,
,switch, d.c. supply , soft iron core, solenoid, small iron
nails and plastic container.
(iv)
(v) The switch is closed.
The reading of the ammeter is recorded = I
The end of the solenoid is dipped into the plastic
container full of small iron nails
The plastic container is removed and the number of nails
attached to the electromagnet is counted = N
The experiment is repeated 5 times with different value
of current by adjusting the rheostat.
(vi) Tabulate the data
(vii) Plot graph N against I
Questions No. 24
(a) Magnetic field strength depends on the number of turns
(b) The magnetic field strength will increase when the number of
turns increase
(c) To investigate the relationship between magnetic field strength
and number of turn on the coil
(i) manipulated : number of turns
(ii) responding : magnetic field strength //number of small
iron pin
(iii) Fixed : size of current// type of core
(iv) Retort stand, soft iron core, connector wire, PVC
insulated copper wire, small iron pin, ammeter, rheostat ,
battery/ power supply
(v) The soft iron core is wound with 20 turns of insulated
copper wire and set up as shown in diagram above.
The switch is turned on and the rheostat adjusted until the
ammeter
Reading is 1.0 A. The beaker containing small steel pin
then brought near the iron core.
Count and record the number of small iron pin attached
to the soft Iron core.
Repeat the experiment by winding the soft iron core with,
30 turns, 40 turns, 50 turns and 60 turns.
(v)
(vi)
Questions No. 25
(a) The amount of lifted scrap metal depends on the current
(b) The higher the current, the stronger the electromagnetism.
(c) To investigate the relationship between the current and the
electromagnetism.
(i) - Manipulated variable : Current
- Responding variable : Electromagnetism
- Constant variable : Number of turns
(ii) Copper wire, soft iron, ammater, rheostat, batteries,
pins/paper Clips
(iii) State a functionable arrangement of the apparatus
(iv) Adjust the rheostat to supply a current, I1 / 0.1A
(v) Count the number of pins/paper clips attract by the
electromagnet
(vi) Adjust the rheostat for 4 different current 0.2A, 0.3A,
0.4A and 0.5A.(Repeat at least 4 times)
(vii) Tabulate the data
(viii) Plot graph of number of pins against current // graph
Questions No. 26
(a) The faster the speed, the brighter the bulb .
(b) The brightness of the light is influenced by the speed of the
wheel.
(c) When the speed increased, the current in the coil produced
increased
(i) Aim of experiment : To determine the relationship
between the velocity of the magnet and the magnitude of
the induced current
(ii) - Manipulated variable :Speed of the magnet
- Responding variable :Galvanometer reading
- Fixed/ constant variables :Number of turns in the
coil
(iii) List of apparatus and materials Galvanometer, connecting
wire, permanent bar magnet, a coil of copper wire, meter
rule, retort stand.
(iv) Arrangement of apparatus
(v) Procedure:
- The meter rule is clipped to the retort stand beside
the copper wire that coiled to a solenoid. The
height of the bar magnet is set at h = 100 cm
- The bar magnet is released into the solenoid. Reading of
the galvanometer is recorded
- The experiment is repeated for the height, h= 80cm, 60
cm, 40 cm and 20 cm. Tabulation of data
(vi)
(vii) Analysis of data: Draw a graph of V against h