FIZIKMOZAC 2010

CHAPTER 9: ELECTRONIC

9.1 CRO

1. Question 4: Melaka 09Diagram 4.1 shows a deflectingcathode rays tube

(a) The function of the filament is toheat the cathode and releaseselectrons on its surface

(i) Name the process mention in (a)

………………………………………

(ii) Explain why a very high voltageof 3000 V is used in Diagram 4.1

........................................................

(iii) State the energy changesexperience by the electronsfrom anode to the screen

………………………………………..

(b) The voltage between the cathodeand anode is 3000 V. The chargeof an electron is 1.6 x 10-19

Calculate the kinetic energypossesses by an electron as itreaches the anode.

[2 marks]

Diagram 4.1 shows a deflecting

The function of the filament is toheat the cathode and releases

Name the process mention in (a)

………………………………………[1 mark]

Explain why a very high voltageof 3000 V is used in Diagram 4.1

........................................................[1 mark]

State the energy changesexperience by the electronsfrom anode to the screen.

………………………………………..[1 mark]

The voltage between the cathodeand anode is 3000 V. The charge

19 C.Calculate the kinetic energypossesses by an electron as it

[2 marks]

(c)(i) 1000 V power supply isconnected to the top and lowerplates. The top plate is connectedto the positive terminal and thelower plate is connectednegative terminal. Sketch thepath of the cathode rays inDiagram 4.2.

(c)(ii) From the answer in (c)(i), stateone characteristic of cathoderays.

………………………………………..

2. Question 4: Kedah 08Diagram 4.1 shows the structure of acathode ray oscilloscope (CRO)

(a) State the process involved inproducing electron from electrodeX.

..........................................................

(c)(i) 1000 V power supply isconnected to the top and lower

plate is connectedto the positive terminal and thelower plate is connected to thenegative terminal. Sketch thepath of the cathode rays in

[1 mark]

From the answer in (c)(i), stateone characteristic of cathode

………………………………………..[1 mark]

Question 4: Kedah 08Diagram 4.1 shows the structure of acathode ray oscilloscope (CRO)

State the process involved inproducing electron from electrode

..........................................................[1 mark]

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(b) Describe the type of motion of theelectron moving from(i) Y to Z

...........................................

(ii) Z to the screen

....................................................

(c) A student uses the CRO to studythe output voltage from a bicycledynamo. Diagram 4.2 shows thetrace on the screen and thesettings of the CRO.

(i) State the type of currentproduced by the dynamo.

.......................................................

(ii) Determine the frequency ofoutput voltage of the dynamo.

[2 marks]

(iii)Sketch the new trace in Diagram4.3 if the time-based setting isset at 0.01 s/div.

Describe the type of motion of the

....................................................[1 mark]

....................................................[1 mark]

A student uses the CRO to studythe output voltage from a bicycle

Diagram 4.2 shows thetrace on the screen and the

State the type of currentproduced by the dynamo.

.......................................................[1 mark]

Determine the frequency of theoutput voltage of the dynamo.

[2 marks]

Sketch the new trace in Diagrambased setting is

9.2 SEMIICONDUCTOR

3. Question 6: MRSM 08(a) Diagram 6.1 shows a waveform on

the screen of a cathode rayoscilloscope that is connectedacross R. Diagram 6.2 showshow an electric component Q isconnected to the circuit.

Diagram 6.1

Diagram 6.2

(i) Tick (x) the correct answerin the box provided. Theinput power supply isDiagram 6.1 is connected to..

......... alternating current

........ direct current

(ii) What is the function ofcomponent Q in Diagram6.2?

..................................................

(iii) Draw the waveform producedon the screen in Diagram 6.2

Question 6: MRSM 08Diagram 6.1 shows a waveform on

screen of a cathode rayoscilloscope that is connectedacross R. Diagram 6.2 showshow an electric component Q isconnected to the circuit.

Diagram 6.1

Diagram 6.2

Tick (x) the correct answerin the box provided. Theinput power supply isDiagram 6.1 is connected to..

......... alternating current

........ direct current[1 mark]

What is the function ofcomponent Q in Diagram

..................................................[1 mark]

Draw the waveform producedn in Diagram 6.2

[1 mark]

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(iv) Compare the waveforms inDiagram 6.1 and Diagram 6.2.Name the process involvedin Diagram 6.2

..................................................[1 mark]

(b) Name the component Q inDiagram 6.2.

.....................................................[1 mark]

(c) Component Q is made from asemiconductor material. Onetype of semiconductor is the n-type. Explain how the n-typesemiconductor is produced.

........................................................

.......................................................[2 marks]

4. Question 6: SBP 08Diagram 6.1 and Diagram 6.2 showstwo diodes A and B, two bulbs P and Qare connected to a dry cell with twodifferent arrangements.

Diagram 6.1

Diagram 6.2(a) Based on Diagram 6.1 and

Diagram 6.2,(i) compare the connection of

diodes to the terminal ofthe dry cell.

..............................................[1 mark]

(ii) compare the lighting of thebulbs.

................................................[1 mark]

(iii) Relate the connection ofdiodes to the terminal ofthe dry cell with the lightingof the bulbs.

...............................................[1 mark]

(b) (i) Draw the arrangement offour diodes and suitablepower supply in the spacegiven in Diagram 6.3 thatcan be used to produce fullwave rectifier circuit.

[3 marks]

ToCRO

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(iii) Draw the wave form of fullwave rectification

[1 mark]

(iv) Name an electroniccomponent that can beused to smooth thecurrent produced.

.............................................[1 mark]

5. Question 7: Teknik 07Impurities are added to a puresemiconductor to increase itsconductivity in a process known asdoping.

(a) (i) State what is meant bysemiconductor?

.......................................................

.......................................................[1 mark]

(ii) Explain why certainsemiconductors are known asn-type semiconductors?

......................................................

......................................................

......................................................[2 marks]

(b) A diode comprises of n and p-typesemiconductors joined together.Diagram 7.1 shows an a.c. supplyconnected to a resistor and adiode.

Diagram 7.1

(i) State the effect of fitting thediode in the circuit to the currentflows

.........................................................[1 mark]

(ii) On Diagram 7.2, sketch graphs toshow the variation of the a.c.supply voltage and the output

ime.

O

voltage with t

a.c. supply voltage

DIAGRAM 7.2

[2 marks]

.

time

utput voltage

time

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(iii) Describe how the outputvoltage can be furtherimproved to get a pure andsmoothened d.c. voltage.

.....................................................

.....................................................

.....................................................

.....................................................

[4

9.3 TRANSISTOR

6. Question 4: Kedah 07Diagram 4.1 shows the use of atransistor in a circuit.

Diagram 4.1

(a) Name the type of transistor used.

.............................................................

(b) The transistor is switched on whenthe base voltage V2 ≥ 2 V.

(i) Write an equation to show therelationship between IB,IE.

.............................................................

Describe how the outputvoltage can be furtherimproved to get a pure andsmoothened d.c. voltage.

.....................................................

.....................................................

.....................................................

.....................................................

[4 marks]

Diagram 4.1 shows the use of a

Name the type of transistor used.

..........................[1 mark]

(b) The transistor is switched on when

Write an equation to show the, IC and

.............................................................[1 mark]

(ii) Calculate the minimum value ofR2 when the transistor isswitched on.

(c) The resistor R2 is then replacedwith a light dependent resistorwhich has a high resistance wheis dark.

(i) Explain whether the bulb willlight up during the day.

.............................................................

.............................................................

(ii) Besides being used as a switch,state one other use of atransistor.

........................................................

7. Question 6: Trengganu 07Diagram 6.1 shows a circuit toinvestigate the working principletransistor.The rheostat R is adjusted to get a setof data of the microammeter reading ,I1 and the miliammeter reading, I

Diagram 6.1

Calculate the minimum value ofwhen the transistor is

[2 marks]

is then replacedwith a light dependent resistorwhich has a high resistance when it

Explain whether the bulb willlight up during the day.

.............................................................

.............................................................[2 marks]

Besides being used as a switch,state one other use of a

..............................[1 mark]

Question 6: Trengganu 07Diagram 6.1 shows a circuit toinvestigate the working principle of a

The rheostat R is adjusted to get a setof data of the microammeter reading ,

and the miliammeter reading, I2.

Diagram 6.1

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Table 6 shows the reading of II1 /μA I2 /mA0.0 0.00.5 0.21.0 0.41.5 0.62.0 0.82.5 1.0

Table 6

(a) Name the current

(i) I1 : ..........................................

(ii) I2 : ..........................................

(b) Using Table 6, state twoobservations about the value of Iand I2

..........................................................

..........................................................[ 2

(c) Based on your answer in (b) statethe function a transistor.

........................................................[ 1

(d) The battery P is removed andreplaced by two resistors.(i) Complete the circuit in

Diagram 6.2 to ensure thetransistor workable withoutbattery P.

Table 6 shows the reading of I1 and I2.

: ..........................................[1 mark ]

..........................................[1 mark]

observations about the value of I1

..........................................................

..........................................................[ 2 marks ]

Based on your answer in (b) state

........................................................[ 1 mark ]

The battery P is removed andreplaced by two resistors.

Complete the circuit inDiagram 6.2 to ensure thetransistor workable without

(ii) State the function of the tworesistors.

............................................

8. Question 7: Johor 08Diagram 7.1 shows a semiconductortransistor.

(a)(i) Name the type of the

……………………………………….

(a)(ii) Transistor has three terminalsconnected to the emitter, baseand collector. Label the emitter,base and collector in Diagram7.1

[ 2 marks ]State the function of the two

..................................................[ 1 mark ]

Question 7: Johor 08Diagram 7.1 shows a semiconductor

Name the type of the transistor.

……………………………………….[1 mark]

(a)(ii) Transistor has three terminalsconnected to the emitter, baseand collector. Label the emitter,base and collector in Diagram

[1 mark]

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(b) Diagram 7.2 shows a transistorcircuit.

When the sliding contact X is at the 0V end of the potentiometer,

(i) is there any current flowthrough the base and emittercircuit?

..................................................

(ii) is there any current flowthrough the base and emittercircuit?

(iii) If the sliding contact X wereraised from 0 V end to the 3 Vend of the potentiometer,what happened to the bulb?Explain your answer

……………………………………

……………………………………[2 marks]

(c) Diagram 7.3 shows a transistor isused to light up during the day.

Diagram 7.2 shows a transistor

contact X is at the 0

is there any current flowthrough the base and emitter

..................................................[1 mark]

is there any current flowthrough the base and emitter

[1 mark]

the sliding contact X wereraised from 0 V end to the 3 V

potentiometer,what happened to the bulb?

……………………………………

……………………………………[2 marks]

Diagram 7.3 shows a transistor isused to light up during the day.

(i) Suggest a modification to lightup the lamp at night.

……………………………………….

A student replaced lamp L with a lamplabeled 240 V 24 W in Diagram 7.3.

(ii) The bulb is not light up.Why the lamp is not light up?

……………………………………….

……………………………………….

(iii) An electrical component isconnected to the outputtransistor so that the lamp islight up. Name the electricalcomponent and state thefunctions.

……………………………………….

……………………………………….

9. Question 7: SBP 07Diagram 7.1 shows a transistor circuitwith a bulb L.

Diagram 7.1

(a) Name the type of transistor shownin Diagram 7.1.

............................................................

modification to lightup the lamp at night.

……………………………………….[1 mark]

A student replaced lamp L with a lamplabeled 240 V 24 W in Diagram 7.3.

The bulb is not light up.Why the lamp is not light up?

……………………………………….

……………………………………….[2 marks]

electrical component isconnected to the output

the lamp isName the electrical

component and state the

……………………………………….

……………………………………….[2 marks]

Question 7: SBP 07Diagram 7.1 shows a transistor circuit

Diagram 7.1

Name the type of transistor shown

............................................................[1 mark]

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(b) Based on Diagram 7.1:(i) What is the potential difference

across point X and point Z?

.............................................................

(ii) What is the total resistancebetween point X and point Z?

..................................................................

(iii) Using the answers from (b)(i)and b(ii), calculate the potentialdifference

[2

(c) State what will happen to thelamp,L, if the base-emitterpotential difference, VBE is 2volts? Explain your answer.

..........................................................

..........................................................

..........................................................[2

(d) Without adding any newcomponent to Diagram 7.1, whatmodification is needed so that theopposite situation than the one in7(c) occur at lamp L.

..........................................................

(e) An automatic fire alarm is neededto emit sound in case of fire.Suggest two modifications thathave to be made to the circuit inDiagram 7.1 by replacing thecomponents with suitableelectronic components.

..........................................................

..............................................

..........................................................[2

What is the potential differenceacross point X and point Z?

.............................................................[1 mark]

What is the total resistancebetween point X and point Z?

.................[1 mark]

Using the answers from (b)(i)and b(ii), calculate the potential

[2 marks]

State what will happen to theemitter

is 2volts? Explain your answer.

..........................................................

..........................................................

..........................................................[2 marks]

agram 7.1, whatmodification is needed so that theopposite situation than the one in

..........................................................[1 mark]

An automatic fire alarm is neededfire.

Suggest two modifications thathave to be made to the circuit inDiagram 7.1 by replacing thecomponents with suitable

..........................................................

..........................................................

..........................................................[2 marks]

10.Question 8: Negeri 9 08Diagram 8 shows a transistor circuit.The circuit is used to automaticallyswitch on the bulb at night.

(a)(i) Name component Q.

........................................................

(a)(ii) State two functions ofcomponent Q?

........................................................

(d) What is the function of resistorR?

.......................................

(c)(i) What happens to potentialdifference VP at night? Explain.

........................................................

........................................................

(c)(ii) Explain why the bulb is lightedup at night?

........................................................

........................................................

(d) Bulb M is labelled 240 V, 60 Wstarts to light up when VV and the resistance of resistorP is 10 kΩ. Determine the maximum resistance of resistorS.

Question 8: Negeri 9 08Diagram 8 shows a transistor circuit.The circuit is used to automaticallyswitch on the bulb at night.

Name component Q.

........................................................[1 mark]

State two functions of

........................................................[2 marks]

What is the function of resistor

.........................................................[1 mark]

(c)(i) What happens to potentialat night? Explain.

........................................................

........................................................[2 marks]

Explain why the bulb is lighted

........................................................

........................................................[2 marks]

Bulb M is labelled 240 V, 60 Wstarts to light up when VP is 2.0

ance of resistorΩ. Determine the

maximum resistance of resistor

[2 marks]

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(e) What happens to the bulbwhen it is connected directly tothe transistor circuit withoutusing the relay switch. Explainwhy.

.....................................................

.....................................................[2 marks]

11.Question 8: Melaka 08Diagram 8.1 shows four electricalcircuits with identical electricalcomponents.The electrical circuits consist otransistor , a bulb, a light dependentresistor, LDR, two resistors, Rand battery as a power supply.

(a) What is meant by power?

..........................................................[1 mark]

(b) Based on Diagram 8.1, state thesuitable characteristic of thearrangement position of theelectrical components of thecircuit to use as an automaticswitch.

(i) Resistor, R2

..........................................................

Reason

.........................................................[2 marks]

What happens to the bulbwhen it is connected directly tothe transistor circuit withoutusing the relay switch. Explain

.....................................................

.....................................................[2 marks]

Diagram 8.1 shows four electricalidentical electrical

The electrical circuits consist of atransistor , a bulb, a light dependentresistor, LDR, two resistors, R1 and R2

power supply.

What is meant by power?

..........................................................[1 mark]

(b) Based on Diagram 8.1, state thesuitable characteristic of thearrangement position of theelectrical components of the

to use as an automatic

..........................................................

.........................................................

(ii) Resistor R1 and light dependentresistor, LDR

...........................................................

Reason

...........................................................

(iii) Collector terminal of the transistorto the battery

......................................

Reason

...........................................................

(c) Based on the answers in 8(b), stateone suitable circuit in Diagram 8to be use as an automatic switch..............................................................

(d) The circuit in 8(c) is used as anautomatic switch. State theapplication of the circuit.

...........................................................

(e) Diagram 8.2 show a circuittransistor used as an amplifier.The transistor is on when thevoltage across Y and Z is 1 V.

light dependent

...........................................................

...........................................................[2 marks]

(iii) Collector terminal of the transistor

...........................................................

...........................................................[2 marks]

Based on the answers in 8(b), stateone suitable circuit in Diagram 8

an automatic switch.

............................................................[ 1 mark]

(d) The circuit in 8(c) is used as anautomatic switch. State the

ion of the circuit.

...........................................................[ 1 mark]

(e) Diagram 8.2 show a circuittransistor used as an amplifier.The transistor is on when thevoltage across Y and Z is 1 V.

FIZIKMOZAC 2010

When the potential differenceaccross Yand Z is 1 V;

(i) What is the potentialdifference between X and Y?

[ 1 mark]

(ii) Calculate the maximumresistance of the rheostat forthe transistor to switch on?

[2 marks]

12.Question 8: Kelantan 09(a) Diagram 8.1 shows a relay used in

an electrical circuit.

(i) What is the function of arelay?

..................................................[1 mark]

(ii) Explain what will happenwhen an electric current flowin the main circuit?

..................................................

..................................................[2 marks]

(b) Diagram 8.2 shows a circuitconsists of an automatic switchusing a relay to switch on a streetlight at night.

(i) Name the component labeledQ.

..................................................[1 mark]

(ii) State the main characteristicfor component Q.

..................................................[1 mark]

(iii) Explain how the componentQ light up the street light.

..................................................

.................................................

.................................................[3 marks]

(c) Diagram 8.3 shows a simpletsunami control system used todetect an earthquake anderuption volcano at the sea bedwhich will produced tsunami.

The circuit consists of vibrationsensor, V, and waves temperaturesensor, T, athe sea bed. The vibrationand increase in temperature detectedwill produce signals whichl will besent to a logic gate and then to thetsunami operation detector roomthrough the transmitter.

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Keys:Vibration sensor,V:With vibration: Logic ‘1’Without vibration : Logic ‘0’

Water temperature sensor, T:High temperature: Logic ‘1’Low temperature: Logic ‘0’

Output S:Radar is activated : Logic ‘1’Radar is deactivated: Logic ‘0’

Tsunami will occur when there is avibration or change of hightemperature at the sea bed.Table 8 is a truth table which showsthe operation of the logic gate in thetsunami control system.

V T S0 00 11 01 1

(i) Using the keys given,complete Table 8.

[2 marks]

(ii) Name the logic gate in thecircuit in Diagram 8.3

..................................................[1 marks]

(iii) In the space below, draw thelogic gate symbol in (c)(ii)

[1 mark]

9.4 LOGIC GATES

13.Question 1: Melaka 07Diagram 1 shows a logic circuitconsisting of get logic C, D and E. X isthe output operation of gate logic D.

(a) Name gates logic C and D.

(i) C: ........................

(ii) D: .......................[2 marks]

(b) (i) State the logic gate of logicgate E.

.....................................................[1 mark]

(iii) In the box below, tick x thecorrect output for X.

1001 _____

1110 _____

1011 _____ [1 mark]

14.Question 3: Johor 2007Diagram 3.1 shows the symbol for aNAND gate.

(a) State the basic logic gates thatform the NAND gate.

.............................................................

[1 mark]

A

BC

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(b) NAND get can be used to makeother types of gate as shown inDiagram 3.2 and Diagram 3.3.

(i)Write a truth table for get inDiagram 3.2.

[1 mark]

(ii) Write a truth table for get inDiagram 3.3.

[2 marks]

(iii)Decide what type of gate isequivalent to get in Diagram 3.2and Diagram 3.3.

Diagram 3.2:

..........................................................

Diagram 3.3:

..........................................................[2 marks]

15.Question 4: MRSM 07Figure 4 shows a circuit whichconsists of several logic gates.

(a)(i) Name the logic gates labelled Pand Q.

P: ...................... Q:....................[2 marks]

(a)(ii) State the function of logic gateX.

........................................................[1 mark]

(b)(i) Based on Figure 4, complete theTruth table below.

Input OutputA B C0 00 11 01 1

[3 marks]

(b)(ii) Draw the symbol of the logicgate which is equivalent tooutput C.

[1 mark]

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16.Question 5: MRSM 09Diagram 5.1 shows an electronicsystem used to switch on a securitylight outside a house.

(a) Name the type of logic gatewhich receives input A.

(b) Based on Diagram 5.1, completethe following sentences aboutinput A, B and C by ticking themark (x) in the correct bracket.(i) If the surrounding is dark

Input A will be

And so input B will be

[2 marks]

(ii) If a person is detected,input C will be

(c) The security light should beswitched on if a person isdetected when it is dark. Namethe type of logic gate whichshould be used in the boxmarked ‘Logic Gate X’.

........................................................

(d) Diagram 5.2 shows acombination of three logicgates.

electronicsystem used to switch on a security

Name the type of logic gate

Based on Diagram 5.1, completethe following sentences aboutinput A, B and C by ticking themark (x) in the correct bracket.

the surrounding is dark

And so input B will be

[2 marks]

If a person is detected,

[1 mark]

The security light should beswitched on if a person isdetected when it is dark. Namethe type of logic gate which

be used in the box

........................................................[1 mark]

combination of three logic

Construct a truth table for the gatecombination shown in Diagram 5.2.

17.Johor 09Diagram 6 shows a circuit used as asafety system in a house.

(a) Name logic gate R.

......................................................

(b) Using two switches, two drycells and a bulb, draw a circuitthat equivalent to logic gate S.

(c) The truth table represents thelogic gate in the Diagram 6above.

A B0 00 11 01 1

(c)(i) Complete the truth table above.

Construct a truth table for the gatecombination shown in Diagram 5.2.

[2 marks]

Diagram 6 shows a circuit used as asafety system in a house.

Name logic gate R.

......................................................[1 mark]

Using two switches, two drycells and a bulb, draw a circuitthat equivalent to logic gate S.

The truth table represents thelogic gate in the Diagram 6

L M

(c)(i) Complete the truth table above.[2 marks]

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(c)(ii) What happens to the door andthe gate when the main switch isclosed?

........................................................

........................................................[2 marks]

(c)(iii) State two methods to open thedoor and the gatesimultaneously. [2 marks]

.......................................................

....................................................

18.Question 7: Perak 07Diagram 7.1 shows a circuit that turnson a water pump.

Diagram 7.1

When the output from the NOR gate ishigh, the water pump is on. The soilcontacts are buried in the soil near theplants. When the soil dries the logicstate of input B changes from high(logic 1) to low (logic 0).

(a) (i) Explain why the logic state ofinput B is low when the soil isdry.

.......................................................

What happens to the door andthe gate when the main switch is

........................................................

........................................................[2 marks]

State two methods to open the

[2 marks]

.....................

....................................................

Diagram 7.1 shows a circuit that turns

When the output from the NOR gate ishigh, the water pump is on. The soil

buried in the soil near theplants. When the soil dries the logicstate of input B changes from high

Explain why the logic state ofinput B is low when the soil is

.......................................................[1 mark]

(ii) Explain why the logic state ofinput A is low when it is darkand high when it is bright.

....................................................

........................................................

(b) Complete the truth table for theNOR gate.

Input A Input B

0 0

0 1

1 0

1 1

(c) The water pump is on. State(i) The logic levels of

input B and output Q.

Input A :…………………

Input B : …………………

Output Q : …………………….

(ii) The light level (dark orbright) and the soilcondition (wet or dry).

Light level:…………………

Soil condition :………………

19.Question 8: Trengganu 09Diagram 8.1 shows an automaticparking barrier for any vehicle enterparking lots. The parkingautomatically rises up when asufficient amount of coin is slotted in amachine or an applicable electroniccard is touched to the detector.

Explain why the logic state ofinput A is low when it is darkand high when it is bright.

........................................................

........................................................[2 marks]

Complete the truth table for the

Output Q

The water pump is on. StateThe logic levels of input A,input B and output Q.

Input A :…………………

Input B : …………………

Output Q : …………………….[3 marks]

The light level (dark orbright) and the soil

ondition (wet or dry).

Light level:…………………

Soil condition :………………[2 marks]

Question 8: Trengganu 09Diagram 8.1 shows an automaticparking barrier for any vehicle enterparking lots. The parking barriersautomatically rises up when asufficient amount of coin is slotted in amachine or an applicable electroniccard is touched to the detector.

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Diagram 8.2 shows the circuit used inthe automatic parking barrier.

(a) Name the electronic componentX.

........................................................

(b) What is the potential differentacross the electronic carddetector when the potentialdifferent across resistor S is4 V?

........................................................

(c) The electronic component Y isconnected to an electric motorto lift up the automatic barrier240 V a.c is supplied to themotor.

(i) Name the electroniccomponent Y.

..................................................

Diagram 8.2 shows the circuit used in

Name the electronic component

........................................................[1 mark]

What is the potential differentacross the electronic carddetector when the potentialdifferent across resistor S is

........................................................[1 mark]

The electronic component Y isconnected to an electric motorto lift up the automatic barrier.

a.c is supplied to the

Name the electronic

..................................................[1 mark]

(ii) Explain why thecomponent Y is used?

..................................................

(d) The following truth table showsthe operation of a logic gate inthe circuit in Diagram 8.2.

Input P

Electroniccarddetector

Inputvoltageat P

Coindetector

No NoNo YesYes NoYes Yes

Key:An applicable electronic card istouched:

High input voltage at P

An inapplicable electronic card istouched:

Low input voltage at P

A sufficient amount of coin slotted inHigh input voltage at Q Logic ‘1’

An insufficient amount of coin isslotted in:

Low input voltage at Q Logic ‘0’

(i) Using the given key,complete the truth tableabove

(ii) Name the logic gate in thecircuit in Diagram 12.2.

.................................................

(iii) Draw the symbol of the logicgate in (d)(ii)

Explain why the electroniccomponent Y is used?

..................................................[1 mark]

The following truth table showsthe operation of a logic gate inthe circuit in Diagram 8.2.

Input Q OutputR

Coindetector

Inputvoltageat Q

An applicable electronic card is

at P Logic ‘1’

An inapplicable electronic card is

ge at P Logic ‘0’

A sufficient amount of coin slotted in:High input voltage at Q Logic ‘1’

An insufficient amount of coin is

Low input voltage at Q Logic ‘0’

Using the given key,complete the truth table

[4 marks]logic gate in the

circuit in Diagram 12.2.

.................................................[1 mark]

Draw the symbol of the logic

[1 mark]

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(e) Using two switches, two drycells and a bulb draw a circuitthat equivalent to logic gate ind(iii)

[2 marks]

20.Understanding: Johor 07A semiconductor diode is made fromcombination of an n-typesemiconductor and p-typesemiconductor.

(a) Explain how an n-typesemiconductor is produce.

[2 marks]

Diagram 12.1 and 12.2 shows a circuitconsisting of a diode and a bulb.

(a) Based on Diagram 12.1 andDiagram 12.2, which bulb willlight up?

[1 mark]

(b) Explain how the bulb will lightup.

[3 marks]

Draw a circuit to produce full-waverectification and show the inputVoltage and the output voltage waveforms.

Explain why a capacitor is connectedin the Diagram 12.3 and how itfunctions.

21.Making decision: Johor 07You are required to set up a batterycharge for your hand phone by usinglower a.c input voltage as in Diagram12.3 and in Table 12.1.

RatioN1:N2

Type oftransformer

core

Diodearrange-

ment100

80

60

40

20

Solid coppercore

Laminatedcopper core

Solid softiron core

Laminatedsoft iron

core

Half-waverectification

Full waverectification

Table 12.1

Study the information in Diagram 12.3and Table 12.1 determine:

(i) the number of turns in theprimary coil and thesecondary coil of thetransformer and justify yourchoice.

(ii) the type of core you will usein the transformer and justifyyour choice.

(iii) the diode arrangement youwill use and justify yourchoice.

[6 marks]

FIZIKMOZAC 2010

22.Section B: Trengganu 09Diagram 10.1 and 10.2 show thedeflections of a cathode ray in adeflection tube.

Diagram 10.1

Diagram 10.2

(a) What is the meaning of cathoderay?

(b) Using Diagram 10.1 andDiagram 10.2,(i) State the charge of the

cathode ray

(ii) Compare the voltage of EHTconnected to the metal plateand the deflection of thecathode ray.

[2 marks]

(c) State the relationship between(i) The voltage of EHT and the

strength of the electric fieldbetween the metal plates.

Section B: Trengganu 09Diagram 10.1 and 10.2 show thedeflections of a cathode ray in a

of cathode

[1 mark]Using Diagram 10.1 and

State the charge of the

[1 mark]

Compare the voltage of EHTconnected to the metal plateand the deflection of the

[2 marks]

State the relationship betweenvoltage of EHT and the

strength of the electric fieldbetween the metal plates.

[1 mark]

(ii) The strength of the electricfield between the metalplates and the deflection ofthe cathode ray.

(d) Diagram 10.3 shows a shadow isformed on fluroscent screethe Maltese cross tube.

Diagram 10.3

Explain how the shadow isformed on the fluorescentscreen?

(e) Maltese cross tube in Diagram10.3 is not suitable formeasuring the frequency of thesound waves. Suggestmodification that can be madeto the Maltese cros tube inDiagram 10.3 to transform it intoCathode Ray Oscilloscope thatcan measure the frequency ofthe sound waes.

In your suggestion, state thecomponents that are used and theirfunction based on the followingaspects:

- the electron gun- the deflection system

The strength of the electricfield between the metalplates and the deflection ofthe cathode ray.

[1 mark]

Diagram 10.3 shows a shadow isformed on fluroscent screen ofthe Maltese cross tube.

Diagram 10.3

Explain how the shadow isformed on the fluorescent

[4 marks]

Maltese cross tube in Diagram10.3 is not suitable formeasuring the frequency of thesound waves. Suggestmodification that can be made

the Maltese cros tube inDiagram 10.3 to transform it intoCathode Ray Oscilloscope thatcan measure the frequency of

In your suggestion, state thecomponents that are used and theirfunction based on the following

the deflection system[10 marks]

FIZIKMOZAC 2010