Term Test G 13 Scheme

7/31/2019 Term Test G 13 Scheme

1/21

The total energy stored in the condenser system shown in the figure will be

(A) 2 J

(B) 4 J

(C)8 J(D) 16 JA parallel plate capacitor with air as the dielectric has capacitance C. A slab of dielectric constant K and having the samethickness as the separation between the plates is introduced so as to fill one-fourth of the capacitor as shown in thefigure. The new capacitance will be

(A)

(B)

(C)

(D)

A and B are two infinitely long straight parallel conductors. C is another straight conductor of length 1 m kept parallel to Aand B as shown in the figure. Then the force experienced by C is

(A)towards B equal to 0.6 105 N

(B) towards A equal to 5.4 105 N(C) towards B equal to 5.4 105 N

(D) towards A equal to 0.6 105 N

22. A battery consists of a variable number n of identical cells having internal resistance connected in series. The

terminals of the battery are short circuited and the current I measured. Which one of the graph below shows

the relationship between I and n


2/21

Five equal resistance, each of resistance R, are connected as shown in figure below. A battery of V volt is connectedbetween A and B. The current flowing in FC will be

(A)

(B)

(C)

(D)

Block A of mass 2 kg is placed over block B of mass 8 kg. The combination is placed over a rough horizontal surface.

Coefficient of friction between B and the floor is 0.5. Coefficient of friction between A and B is 0.4. A horizontal force of

10 N is applied on block B. The force of friction between A and B is ______.

(A)zero(B) 50 N(C) 40 N(D) 100 N

A wire suspended vertically from one of its ends is stretched by attaching a weight of 100N to its lower end. What is theelastic potential energy stored in the wire, if the weight stretches the wire by 1.5 mm?

(a) 5 102 J (b) 103 J

(c) 2.5 103 J (d) 7.5 102 JAnswer: (d)

A body of mass 500 g is fastened to one end of a steel wire of length 2 m and area of cross-section 2 mm2. if the

breaking stress of he wire is 1.25 107 N/m2, then the maximum angular velocity with which the body can be rotated ina horizontal circle is

(a) 2 rad/s (b) 3 rad/s(c) 4 rad/s (d) 5 rad/s

Answer: (d)

In a wire, when the elongation is 2 cm, the energy stored is E. if the wire is stretched by 10 cm, then the energy storedin the wire will be(a) E (b) 5E

(c) 25E (d)Answer: (c)

What is the energy stored per unit volume in a copper wire, which produces longitudinal strain of 0.1%.

[Y 1.1 1011 N/m2]

(a) 11 103 J/m3 (b) 5.5 103 J/m3(c) 11 104 J/m3 (d) 5.5 104 J/m3Answer: (d)


3/21

The magnitude of the force developed by raising the temperature from 0 C to 100 C of the iron bar of 1.00 m long and

1 cm2 cross-section when it is held so that it is not permitted to expand or bend is( 105/C and Y 1011 N/m2) (CPMT 91)

(a) 103 N (b) 104 N

(c) 105 (d) 109 NAnswer: (b)

The radii of two wires of a same material are in ratio 2:1. if the wires are stretched by equal forces, the stress producedin them will be (MHT CET 2005)(a) 2:1 (b) 4:1(c) 1:4 (d) 1:2Answer: (c)

A body of mass 100 gram, tied at the end of a string of length 3 m rotates in a vertical circle and is just able to completethe circle. If the tension in the string at its lowest point is 3.7 N, then its angular velocity will be ______ (g = 10 m/s2)

(a) 4 rad/s(b) 3 rad/s

(c) 2 rad/s(d) 1 rad/s

A body of mass m performing UCM with frequency n along the circumference of circle having radius r, force is given by

(a) 4nm2

(b) 42n2m

(c) 2n2mr

(d) nm2

A car sometimes overturns while taking a turn. When it overturns, it is(a) the inner wheel which leaves the ground first(b) the outer wheel which leaves the ground first(c) both the wheel leave the ground simultaneously(d) either inner wheel or the outer wheel leaves the ground

A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle.The motion takes place in a plane. It follows that(a) its velocity is constant(b) its acceleration is constant(c) its motion is linear(d) its motion is circular

If T1 and T2 are the periods of a simple pendulum and a conical pendulum respectively, of the same length, then(a) T1 = T2 (b) T1 > T2

(c) T1 < T2 (d) T1 =

A wheel is subjected to uniform angular acceleration about its axis. Initially its angular velocity is zero. In the first twoseconds, it rotates through 1 and in next two seconds, it rotates through 2. What is the ratio 2 / 1?

(a) 1 (b) 2(c) 3 (d) 4When particle revolves with uniform speed on a circular path(a) no force acts on it(b) no acceleration acts on it(c) no work is done by it(d) its velocity is constant


4/21

Two tuning forks of frequencies 256 and 258 vibrations/second are sounded together. Then the time interval betweentwo consecutive maxima heard by an observer is (PMT - MP-88)

(a) 2 sec(b) 0.5 sec(c) 250 sec(d) 252 secAnswer: (b)

56 tuning forks are so arranged in series, that each fork gives 4 beats/second with the previous one. If the frequency ofthe last fork is 3 times that of the first, then the frequency of the first fork will be

(a) 55 Hz(b) 110 Hz(c) 75 Hz

(d) 220 HzAnswer: (b)

Answer: (b)

A tuning fork of frequency 480 Hz. Produces 10 beats per second when sounded with a vibrating sonometer string. Whatmust have been the frequency of the string if a slight increase in tension produces fewer beats per seconds thenbefore? (PMT-92, NCERT-84)(a) 460 Hz

(b) 470 Hz(c) 480 Hz(d) 490 HzAnswer: (b)

A source is moving towards observer with a speed of 20 m/s and having frequency 240 Hz and observer is movingtowards source with a velocity 20 m/s. what is the apparent frequency heard by observer if velocity of sound 340 m/s?(a) 270 Hz(b) 240 Hz

(c) 268 Hz(d) 360 HzAnswer: (a)

The waves produced in a vibrating tuning fork are

(a) Longitudinal in both the stem and the prongs(b) Transverse in both stem and the prongs(c) Longitudinal in prongs and transverse in stem

(d) Longitudinal in stem and transverse in prongsAnswer: (d)

The velocity of sound in any gas depends upon(CBSE-92)(a) Wavelength of sound only(b) Density and elasticity of gas(c) Intensity of sound waves only

(d) Amplitude and frequency of sound


5/21

(1) A wooden block performs SHM on a frictionless surface with frequency, 0. The block carries a charge +Q on its

surface. If now auniform electric field Eis switched on as shown, then the SHM of the block will be

(A) of the same frequency and with shifted meanposition

(B) of the same frequency and with the same mean position

(C) of changed frequency and with shifted mean position

(D) of changed frequency and with the same mean position

When the uniform electric field is switched on, the positively charged block experiences a constant force in the direction of

the electric field and so the mean position of the block is shifted. But the frequency ()of oscillation of the block is

unchanged since it depends only on the mass m of the block and the force constant k of the spring, in accordance with the

relation

=(1/2) [(k/m)]

The correct option is (A).

A ray of light is incident at the glass-water interface at an angle I, it emerges finally parallel to the surface

of water, then the value of mg would be:

(a) (4/3) sin I

(b) 1/sin i

(c) 4/3

(d) 1

In the shown arrangement of the experiment of the meter bridge if AC corresponding to null deflection of

galvanometer is x, what would be its value if the radius of the wire AB is doubled?


6/21

(a) x

(b) x/4

(c) 4x

(d) 2x

Two planets have the same size, but

different masses, and no atmospheres. Which of

the following would be the same for objects with

equal mass on the surfaces of the two planets?

I. The rate at which each would fall freely

II. The amount of mass each would balance on an equalarmbalance

III. The amount of momentum each would acquire whengiven a certain impulse

(A) I only (B) III only

(C) I and II only

(D) II and III only

(E) I, II, and III

Explain your reasoning:More massive planet has a larger value of g. I cant be same. For balancing, the weight of the mass balanced

would be more but as long as masses are equal it will

balance and total mass is equivalent in both places. Impulse

is Ft and equals chance in momentum, this is not affected by

gravity so also is same

An open cart on a level surface is rolling

without frictional loss through a vertical downpour

of rain, as shown above. As the cart rolls, an

appreciable amount of rainwater accumulates in the

cart. The speed of the cart will(A) increase because of conservation of momentum

(B) increase because of conservation of mechanical

energy

(C) decrease because of conservation of momentum(D) decrease because of conservation of mechanical

energy(E) remain the same because the raindrops are falling

perpendicular to the direction of the cart's motion

4. An open cart on a level surface is rolling without frictional loss through a vertical downpour of rain, as shown above. As the cart

rolls, an appreciable amount of rainwater accumulates in the cart. The speed of the cart will


7/21

Which three of the glass lenses shown, when placed in air, will cause parallel rays of light

to converge

(1) I , II and III (2) I , III and V (3) I , IV and V (4) II , III and IV (5) II , IV and V

Two conducting spheres of different radii as shown ,each have chargeQ. Which of the following occurs when the two

spheres are connected with a conducting wire

(1) No charge flows

(2) Negative charge flows from the larger sphere to the smaller sphere until the electric field at the surface of eachsphere is the same

(3) Negative charge flows from the larger sphere to the smaller sphere until the electric potential of each sphere is

the same

(4) Negative charge flows from the smaller sphere to the larger sphere until the electric field at the surface of each

sphere is the same

(5) Negative charge flows from the smaller sphere to the larger sphere until the electric potential of each sphere is

the same

2 litre water at 27C is heated by a 1 kW heater in an open container. On an average heat is lost to surroundings at the rate

160 J/s. The time required for the temperature to reach 77C is

(1) 8 min 20 sec (2) 10 min 20 sec (3) 7 min (4) 14 min (5) 14 min 20 sec

Which of the following statements are true for both sound waves and electromagnetic waves?

A. They can undergo refraction.B. They can undergo diffraction.C. They can produce a two-slit interference pattern.D. They can produce standing waves.

(1) A and B only (2) C and D only (3) A, B, and C only

(4) B, C, and D only (5) A, B, C, and D


8/21

A stationary object explodes, breaking into three pieces of masses m, m, and 3m. The two pieces of mass m move off at right angles

to each other with the same magnitude of momentum mV, as shown in the diagram

above. What are the magnitude and direction of the velocity of the piece having mass 3m ?

System shown in figure is in equilibrium. The magnitude of change in tension in the string just before and just after, when

one of the spring is cut. Mass of both the blocks is same and equal to m and spring constant of both springs is k. (Neglect

any effect of rotation)

(1) mg / 2 (2) mg / 4 (3) 3 mg / 4 (4) 3 mg / 2 (5) 5 mg / 4


9/21

27. A hot liquid kept in a beaker cools from 80C to 70C in two minutes. If the surrounding temperature is 30C, then the time of cooling of the

same liquid from 60C to 50C is(a) 240 s (b) 360 s(c) 480 s (d) 216 s

(e) 264 s.

27. Which of the following is not characteristics of simple harmonic oscillation?(a) the motion is periodic

(b) the motion is along straight line about the mean position(c) the acceleration of the particle is directed towards the extreme positions

(d) the oscillations are responsible for the energy transportation

(e) the period is given by T =2m/ k where the symbols

have usual meaning.


10/21

A convex lens is made of 3 layers of glass of 3 different materials as in the figure. A point object is placedon its axis. The number of images of the object are

(A) 1(B) 2(C) 3(D) 4The equivalent resistance between the points A and B will be (each resistance is 15 )

(A) 30

(B)8

(C) 10

(D) 40

The coefficient of thermal conductivity of copper is 9 times that of steel. In the composite cylindrical barshown in the figure, what will be the temperature at the junction of copper and steel?

(A) 75C(B) 67C(C) 25C(D) 33CForce F on a particle moving in a straight line varies with distance d as shown in the figure. The work doneon the particle during its displacement of 12 m is

(A) 13 J(B) 18 J(C) 21 J(D) 26 J


11/21

A cricket bat is cut at the location of its center of mass as shown. Then

(1) the two pieces will have the same mass

(2) the bottom piece will have larger mass

(3) the handle piece will have larger mass

(4) mass of handle piece is double the mass of bottom piece

(5) cannot say

Circuit for the measurement of resistance by potentiometer is shown. The galvanometer is first connected at points and zero deflection is observed at

length PJ= 10 cm. In second case it is connect at point Cand zero deflection is observed at a length 30 cm from P. Then the unknown resistance Xis(a) 2R(b)R/2 (c)R/3 (d) 3R

In a practical wheat stone bridge circuit as shown, when one more resistance of 100 is connected in

parallel with unknown resistance ' x ', then ratio 1/2 become ' 2 ' 1 is balance length. AB is a uniform

wire. Then value of ' x ' must be:

(1) 50 (2) 100 (3) 150(4) 200 (5) 250(2) A particle performing uniform circular motion has angular momentumL. If its angular frequency is doubled

and its kinetic energy halved, then the new angular momentum is

(1)L/2

(2)L/4

(3) 2L(4) 4L

sol (2)

E L L

3


12/21

1

so if its angular frequency is doubled and its kinetic energy is haved then new

angular momentum will become

4

L

times.

A student weighing 700 N climbs at constant speed to

the top of an 8 m vertical rope in 10 s. The average power

expended by the student to overcome gravity is most nearly(A) 1.1 W (B) 87.5 W (C) 560 W

(D) 875 W (E) 5,600 W

Three objects can only move along a straight, level path. The graphs below show the positiondof each

of the objects plotted as a function of timet.

The magnitude of the momentum of the object is

increasing in which of the cases?

(A)II only (B) III only (C) I and II only

(D) I and III only (E) I, II, and III

A glass slab of thickness 3 cm and refractive index 3/2 is placed on ink mark on a piece of paper. For a person looking at the mark at a distance 5.0cm above it, the distance of the mark will appear to be

(a) 3.0 cm (b) 4.0 cm(c) 4.5 cm (d) 5.0 cm(e) 3.5 cm.

An incompressible fluid flows steadily through a cylindrical pipe which has radius 2r at point A and radius ratB further along the flow direction. If

the velocity at pointA is v, its velocity at pointB is(a) 2v (b) v (c) v/2 (e) 8v.

(d) 4v


13/21

igure shows an arrangement of masses hanging from a ceiling. In equilibrium, each rod is horizontal, has negligiblemass and extends three times as far to the right of the wire supporting it as to the left. If mass m4 is 48 kg then

mass m1 is equal to

(1) 1 kg

(2) 2 kg

(3) 3 kg

(4) 4 kg

(5) 5 kg

The bob of a simple pendulum is a spherical hollow ball filled with water. A plugged hole near thebottom of the oscillating bob gets suddenly unplugged. During observation, till water is comingout, the time-period of the oscillation would

( 1 ) first decrease and then increase to the original value( 2 ) first increase and then decrease to the original value( 3 ) increase towards a saturation value

( 4 ) remain unchanged

( 5 ) decrease towards a saturation value


14/21

41. A cricket bat is cut at the location of its center of mass as

shown. Then

(1) the two pieces will have the same mass

(2) the bottom piece will have larger mass

(3) the handle piece will have larger mass

(4) mass of handle piece is double the mass of bottom piece

(5) cannot say

42. Circuit for the measurement of resistance by potentiometer is shown.The galvanometer is first connected at points and zero deflection is

observed at length PJ= 10 cm. In second case it is connect at point C

and zero deflection is observed at a length 30 cm from P. Then the

unknown resistance X is

(1) R (2) 2R (3) R / 2 (4) R/3 (5) 3R

43. Two massesMandM /2 are joined together by means of light inextensiblestring passed over a frictionless pulley as shown in the figure. When thebigger mass is released, the small one will ascent with an acceleration of

(1) g/3 (2) 3g/2 (3) g /2 (4) g (5) g/4

44. A glass slab of thickness 3 cm and refractive index 3/2 is placed on ink mark on a piece of paper. For aperson looking at the mark at a distance 5.0 cm above it, the distance of the mark will appear to be

(1) 3.0 cm (2) 4.0 cm (3) 4.5 cm (4) 5.0 cm (5) 3.5 cm.

45. The graph represents the potential energy Uas a function of displacement

x for an object on the end of a spring oscillating in simple harmonic motion

with amplitude x0. Which of the following graphs represents the kinetic

energy Kof the object as a function of displacementx


15/21

36. One end of horizontal string is fixed to a wall. A transverse pulse is

generated at the other end, moves towards the wall as shown and it is

reflected at the wall. Properties of the reflected pulse include which of

the following

(A) It has a greater speed than that of the incident pulse

(B) It has a greater amplitude than that of the incident pulse

(C) It is on the opposite side of the string from the incident pulse

(1) A only (2) C only (3) A and B only

(4) B and C only (5) All A, B and C

37. What is the kinetic energy of a satellite of mass m that orbits the Earth, of mass M, in a circular orbit of

radius R

(1) Zero (2) GMm / 2R (3) GMm / 4R (4) GMm /2R2 (5) GMm / R2

38. Three objects can only move along a straight,

level path. The graphs below show the position d

of each of the objects plotted as a function of time t.

The magnitude of the momentum of the object is

increasing in which of the cases

(1) II only (2) III only (3) I and II only

(4) I and III only (5) I, II, and III

39. The graph shows the velocity v as a function of time tfor an object moving in

a straight line. Which of the following graphs shows the correspondingdisplacementx as a function of time tfor the same time interval

(1) (2) (3)

(4) (5)

40. What is the tension in the upper string

(1) 10 N (2) 20 N (3) 40 N

(4) 50 N (5) 60 N


16/21

30. System shown in figure is in equilibrium. The magnitude of change in

tension in the string just before and just after, when one of the spring is

cut. Mass of both the blocks is same and equal to m and spring constant

of both springs is k. (Neglect any effect of rotation)

(1) mg / 2 (2) mg / 4 (3) 3 mg / 4(4) 3 mg / 2 (5) 5 mg / 4

31. Figure shows an arrangement of masses hanging

from a ceiling. In equilibrium, each rod is horizontal,

has negligible mass and extends three times as far to

the right of the wire supporting it as to the left. If

mass m4 is 48 kg then mass m1 is equal to

(1) 1 kg

(2) 2 kg

(3) 3 kg(4) 4 kg

(5) 5 kg

32. In a practical wheat stone bridge circuit as shown,

when one more resistance of 100 is connected in

parallel with unknown resistance x , then ratio 1/2become ' 2 ' 1 is balance length. AB is a uniform

wire. Then value of ' x ' must be

(1) 50 (2) 100 (3) 150 (4) 200 (5) 250

33. A particle performing uniform circular motion has angular momentumL. If its angular frequency is

doubled and its kinetic energy halved, then the new angular momentum is

(1) L / 2 (2) L / 4 (3) 2 L (4) 3 L (5) 4 L

34. Which of the following statements are true for both sound waves and electromagnetic waves?

A. They can undergo refraction.B. They can undergo diffraction.C. They can produce a two-slit interference pattern.

D. They can produce standing waves.

(1) A and B only (2) C and D only (3) A, B, and C only

(4) B, C, and D only (5) A, B, C, and D

35. A student weighing 700 N climbs at constant speed to the top of an 8 m vertical rope in 10 s. The average

power expended by the student to overcome gravity is most nearly

(1) 1.1 W (2) 87.5 W (3) 560 W (4) 875 W (5) 5,600 W


17/21

01.An ideal gas is taken via path ABCA as shown in figure. The network done in the whole cycle is

(A) 3P1V1

(B) 3 P1V1(C) 6 P1V1(D) zero

A ball rests upon a flat piece of paper on a table top. The paper is pulled horizontally but quickly towardsright as shown. Relative to its initial position with respect to the table, the ball _____.

(a) remains stationary if there is no friction between the paper and the ball.(b) moves to the left and starts rolling backwards, i.e. to the left if there is a friction between the paper andthe ball.(c) moves forward, i.e. in the direction in which the paper is pulled.Here, the correct statement/s is/are _____ .

(A) only (a)(B) only (b)(C) both (a) and (b) physics questions(D) only (c)

24. The bob of a simple pendulum is a spherical hollow ball filled with water. A plugged hole

near the bottom of the oscillating bob gets suddenly unplugged. During observation, tillwater is coming out, the time-period of the oscillation would

( 1 ) first decrease and then increase to the original value( 2 ) first increase and then decrease to the original value( 3 ) increase towards a saturation value

( 4 ) remain unchanged( 5 ) decrease towards a saturation value

25. A pendulum suspended from the ceiling of a train has a period T when the train is at rest.If the train accelerates with uniform acceleration a, the time-period of oscillations of thependulum becomes

( 1 ) T ( 2 ) T / 2 ( 3 ) T [ g / ( a 2 + g 2 ) ]( 4 ) T [ g / ( g + a ) ] ( 5 ) T [ g / ( g - a )

26. An open cart on a level surface is rolling without frictional loss through a

vertical downpour of rain, as shown above. As the cart rolls, an appreciable

amount of rainwater accumulates in the cart. The speed of the cart will

(1) increase because of conservation of momentum(2) increase because of conservation of mechanical energy

(3) decrease because of conservation of momentum

(4) decrease because of conservation of mechanical energy

(5) remain the same because the raindrops are falling perpendicular to the

direction of the cart's motion

27. A block of mass 3m can move without friction on a horizontal table.

This block is attached to another block of mass m by a cord that passes

over a frictionless pulley, as shown above. If the masses of the cordand the pulley are negligible, the magnitude of the acceleration of the

descending block is,

(1) Zero (2) g / 4 (3) g / 3

(4) 2 g / 3 (5) g

28. A convex lens is made of 3 layers of glass of 3 different materials as in thefigure. A point object is placed on its axis. The number of images of the object

are

(1) 1 (2) 2 (3) 3 (4) 4 (5) 5

29. Liquid oxygen at 50 K is heated to 300 K at constant pressure of 1 atm. The rate of heating is constant.

Which of the following graphs represents the variation of temperature with time?

(1) (02) (3) (4) (5)


18/21

18. The total energy stored in the condenser system shown in the figurewill be

(1) 2 J

(2) 4 J(3) 8 J

(4) 16 J(5) 20 J

19. Which three of the glass lenses shown, when placed in air,

will cause parallel rays of light to converge

(1) I , II and III (2) I , III and V

(3) I , IV and V (4) II , III and IV

(5) II , IV and V

20. Two conducting spheres of different radii as shown , each have chargeQ. Which of the

following occurs when the two spheres are connected with a conducting wire

(1) No charge flows

(2) Negative charge flows from the larger sphere to the smaller sphere until the electric field

at the surface of each sphere is the same

(3) Negative charge flows from the larger sphere to the smaller sphere until the electric

potential of each sphere is the same

(4) Negative charge flows from the smaller sphere to the larger sphere until the electric field

at the surface of each sphere is the same

(5) Negative charge flows from the smaller sphere to the larger sphere until the electricpotential of each sphere is the same

21. 2 litre water at 27C is heated by a 1 kW heater in an open container. On an average heat is lost to

surroundings at the rate 160 J/s. The time required for the temperature to reach 77C is

(1) 8 min 20 sec (2) 10 min 20 sec (3) 7 min (4) 14 min (5) 14 min 20 sec

22. In the network shown in the circuit, each resistance isR ohm. The effective resistance between A and B is

(1) ( 4/3 ) R ( 2 ) ( 3/2 ) R ( 3 ) 7 R

( 4 ) ( 8/7 ) R ( 5 ) ( 7 / 8 ) R

23. The resistance of a coil at 100 C is 4.2 . If temperature coefficient of resistance is 0.004/ C,

then its resistance at 0 C is

( 1 ) 6.5 ( 2 ) 5 ( 3 ) 3 ( 4 ) 2.5 ( 5 ) 7.5


19/21

12. An ideal gas is taken via path ABCA as shown in figure. The network

done in the whole cycle is

(1) 3P1V1 (2)3 P1V1 (3)6 P1V1 (4) zero (5) - 6 P1V1

13. The magnitude of the force developed by raising the temperature from 0 C to 100 C of the iron bar of1.00 m long and 1 cm2 cross-section when it is held so that it is not permitted to expand or bend is

( Coefficient of linear expansion 105/C and Youngs Modulus Y 1011 N/m2)

(1) 103 N (2) 104 N (3) 105 (4) 108 N (5) 109 N

14. A wire suspended vertically from one of its ends is stretched by attaching a weight of 100N to its lowerend. What is the elastic potential energy stored in the wire, if the weight stretches the wire by 1.5 mm?

(1) 5.0 102 J (2) 1.0 x 103 J (3) 2.5 103 J (4) 7.5 102 J (5) 1.0 x 10-2

15. The coefficient of thermal conductivity of copper is 9 timesthat of steel. In the composite cylindrical bar shown in the

figure, what will be the temperature at the junction of copper

and steel?

(1) 75C (2)67C (3)25C (4)33C (5) 45C

16. A and B are two infinitely long straight parallel conductors. C is anotherstraight conductor of length 1 m kept parallel to A and B as shown in the

figure. Then the force experienced by C is

(1) towards B equal to 0.6 105 N(2) towards A equal to 5.4 105 N

(3) towards B equal to 5.4 105 N(4) towards A equal to 0.6 105 N

(5) zero

17. Two planets have the same size, but different masses, and no atmospheres. Which of the following would

be the same for objects with equal mass on the surfaces of the two planets

(A) The rate at which each would fall freely

(B) The amount of mass each would balance on an equal arm balance

(C) The amount of momentum each would acquire when given a certain impulse

(1) A only (2) C only (3) A and B only (4) B and C only (5) A , B , and C


20/21

05. A source is moving towards observer with a speed of 20 m/s and having frequency 240 Hz and observer ismoving towards source with a velocity 20 m/s. what is the apparent frequency heard by observer if velocity of

sound 340 m/s

(1) 270 Hz (2) 240 Hz (3) 268 Hz (4) 360 Hz (5) 250 Hz

06. A body of mass m performing uniform circular motion with frequency n along the circumference of circlehaving radius r, force is given by

(1) 4nm2 (2) 42n2mr (3) 2n2mr (4)

nm2 (5)

nm2

07. Force F on a particle moving in a straight line varies with distance d

as shown in the figure. The work done on the particle during its

displacement of 12 m is

(1) 13 J (2) 18 J (3) 21 J (4) 24 J (5) 26 J

08. What is the energy stored per unit volume in a copper wire, which produces longitudinal strain of 0.1%.[Youngs modulus of the copper 1.1 1011 N/m2]

(1) 11 103 J/m3 (2) 5.5 103 J/m3 (3) 11 104 J/m3 (4) 5.5 104 J/m3 (5) 5.5 105 J/m3

09. A ray of light is incident at the glass-water

interface at an angle I, it emerges finally parallel

to the surface of water, then the value ofg

would be

(1) (4/3) sin I

(2) 1/sin i

(3) 4/3

(4) 1

(5) 2/3

10. 56 tuning forks are so arranged in series, that each fork gives 4 beats/second with the previous one. If thefrequency of the last fork is 3 times that of the first, then the frequency of the first fork will be

(1) 55 Hz (2) 110 Hz (3) 75 Hz (4) 220 Hz (5) 221 Hz

11. If T1 and T2 are the periods of a simple pendulum and a conical pendulum respectively, of the same length,then

(1) T1 = T2 (2) T1 > T2 (3) T1 < T2 (4) T1 =

(5) T1 = 2T2


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