Free Printable Physics FLP-2 Test

1.

Newton’s third law concerns the forces of interaction between two bodies. Which of the following statements relating to the third law is not correct?

a)

the two forces must be of the same type

b)

the two forces are always opposite in direction

c)

the two forces must act on different bodies

d)

the two forces are equal and opposite so the bodies are in equilibrium

2.

Four projectiles are fired with the same velocity at angle, 25°, 40°, 55° and 70° with the horizontal. The range of projectile will be largest for the one projected at angle

a)

70°

b)

55°

c)

40°

d)

25°

3.

A train is moving east at a speed of 5 ms^–1. A bullet fired westwards with a velocity of 10 ms^–1 crosses the train in 8 s. The length of the train is

a)

120 m

b)

30 m

c)

60 m

d)

15 m

4.

A moving body need not have

a)

Velocity

b)

Momentum

c)

Potential energy

d)

Kinetic energy

5.

The mass of two substances are 25g and 81g respectively. If their kinetic energies are same then the ratio of their momentum is

a)

9:5

b)

5:9

c)

1:4

d)

2:1

6.

An object is projected upward with a velocity of 100 ms^–1. It will strike the ground in nearly (Given: g = 10 ms^–2)

a)

5 s

b)

10 s

c)

15 s

d)

20 s

7.

Which of the following velocity-time graphs represents infinite acceleration?

a)

Straight line normal to the time-axis

b)

Straight line parallel to the time-axis

c)

Straight line inclined to the time axis at an angle of 45°

d)

Straight line inclined to the time axis at an angle of 135°

8.

A body is projected from the ground at an angle of 60° with the horizontal. The ratio of the maximum height attained by it to its horizontal range is

a)

$\sqrt[]{3}:1$

b)

$\sqrt[]{3}:2$

c)

$1:\sqrt[]{3}$

d)

$\sqrt[]{3}\ 4$

9.

The diagram shows a small car of mass 500 kg approaching a hill. It moves up the hill with uniform speed.

Ignore friction and take the value of g to be 10 N/kg. How much work is done in moving the car up the hill?

a)

5x10³J

b)

5x10⁴ J

c)

1x10⁵ J

d)

1x10⁶ J

10.

A fly wheel rotates about a fixed axis and slows down from 300 rpm to 100 rpm in 2 minutes. Then its angular retardation in radian / minute² is

a)

$\frac{100}{\pi}$

b)

100

c)

100π

d)

200π

11.

A body of mass m is suspended from a string of length l. What is minimum horizontal velocity that should be given to the body in its lowest position so that it may complete one full revolution in the vertical plane with the point of suspension as the center of the circle?

a)

$\sqrt[]{5gl}$

b)

$\sqrt[]{4gl}$

c)

$\sqrt[]{2gl}$

d)

$\sqrt[]{3gl}$

12.

Work done by variable force is determined by dividing

a)

Force into small interval

b)

Both force and displacement into small intervals

c)

Displacement into small interval

d)

Force into small and displacement into large intervals

13.

A volunteer is rotated in a horizontal circle of radius 7m. Find period of rotation for which the acceleration is equal to 3g.

a)

2.61 s

b)

2.37 s

c)

3.07 s

d)

4.29 s

14.

The diagram shows a long rope fixed at one end. The other end is moving up and down, setting up a stationary wave.

What is the phase difference between the oscillations at X and Y?

a)

0

b)

1/2 π rad

c)

1/4 π rad

d)

3/4 π rad

15.

A whistle with frequency 1020 Hz blown at a station. A man travelling in train moving towards the station at 30 ms^–1 the sound of the whistle. If the speed of sound is 340 m/s, the apparent frequency heard by him is

a)

610 Hz

b)

1020 Hz

c)

2040 Hz

d)

1110 Hz

16.

An observer standing at sea coast observes 54 waves reaching the coast per minute. If the wavelength of the waves is 10 m, then the wave velocity is

a)

4 ms^–1

b)

7 ms^–1

c)

9 ms^–1

d)

12 ms^–1

17.

The velocity and acceleration of a particle performing S.H.M have a steady phase relationship. The acceleration shows a phase lead over the velocity of

a)

ℼ

b)

ℼ / 2

c)

-ℼ/2

d)

-ℼ

18.

Stars moving with respect to earth shows

a)

A

b)

B

c)

C

d)

D

19.

The sound carried by air from a sitar to a listener is a wave of the following

a)

Longitudinal stationary

b)

Transverse progressive

c)

Transverse stationary

d)

Longitudinal progressive

20.

If the frequency of input signal is “f” then the frequency of output of half wave rectifier is

a)

f/2

b)

f/4

c)

f

d)

2f

21.

The curves A, B and C show P-V graph for different thermodynamic processes. The isothermal process is represented by

a)

A

b)

B

c)

C

d)

D

22.

For hydrogen C_p - C_v = a and for oxygen C_p - C_v = b, then

a)

a = b

b)

a = 16b

c)

b = 16a

d)

A & B are not related

23.

A capacitor of $5\mu F$ is charged to 10V. The charge stored on each plate is

a)

5 x10^-6 C

b)

2.5 x 10^-4 C

c)

5 x 10^-5 C

d)

2.5x10^-4 C

24.

A hollow metal ball 8 cm in diameter is given a charge -4x10^-8C

The potential on the surface of the ball is

a)

–9000 volt

b)

–900 volt

c)

–90 volt

d)

Zero volt

25.

The P.D across which of the following resistance of the circuit shown is greatest

a)

R₁

b)

R₂

c)

R₃

d)

Same across each

26.

A conductor of length 1 m carrying current of 1A is placed parallel to a magnetic field of 1 gauss. The magnetic force acting on the conductor is

a)

Zero

b)

1 newton

c)

10^-4 newton

d)

1 dyne

27.

The number of turns in the primary coil of a transformer is 200 and the number of turns in the secondary coil is 10. If 240 volt AC is applied to the primary, the output from the secondary will be

a)

48 V

b)

24 V

c)

12 V

d)

6 V

28.

If length of wire is doubled and area of cross section is halved then the resistivity of the wire

a)

Doubled

b)

Halved

c)

Four times

d)

Remains same

29.

Which diagram is the correct circuit for full-wave rectification?

a)

A

b)

B

c)

C

d)

D

30.

An atom emits a spectral line of wavelength λ when an electron makes a transition between levels of energy E₁ and E₂ . Which expression correctly relates l, E₁

and E₂ ?

a)

$λ=\ \frac{h}{c}\left(E_1-E_2\right)$

b)

$λ\ ch\left(E_1-E_2\right)$

c)

$λ\ =\frac{c}{h\left(E_1-E_2\right)}$

d)

$λ\ =\frac{ch}{E_1-E_2}$

31.

An electron jumps from the 4th orbit to the 2nd orbit of hydrogen atom. Given: the

Rydberg’s constant R = 105 cm^–1. The frequency in Hz of the emitted radiation will be

a)

$\frac{3}{16}x\ 10^5$

b)

$\frac{3}{16}x\ 10^{15}$

c)

$\frac{9}{16}x\ 10^{15}$

d)

$\frac{3}{4}x\ 10^{16}$

32.

T.E of hydrogen atom is times its K.E.

a)

-1/2

b)

-1

c)

2

d)

50

33.

In order to trace the line of a water-pipe buried 0.4 m below the surface of a field, an engineer wishes to add a radioactive isotope to the water. Which sort of isotope should be chosen?

a)

A

b)

B

c)

C

d)

D

34.

A nuclide of mass number A and atomic number Z emits $\beta$ -particle. The mass no and atomic no. of resulting nuclide are

a)

A, Z

b)

A + 1, Z

c)

C, Z – 1

d)

A, Z + 1

35.

What are the numbers of neutrons, protons and electrons in a neutral atom of $_{92}^{^{235}}U$

a)

A

b)

B

c)

C

d)

D

36.

Which of following represents the relation for no. of radioactive atoms left at any instant t

a)

N = N_o e^t

b)

N = N_o e^λt

c)

N = N_o e^–t

d)

N = N_o e^-λt

37.

Ratio of radii of 3rd energy state to 3rd excited state:

a)

3/4

b)

4/3

c)

16/9

d)

9/16

38.

The kinetic energy of electron and proton is 10⁻³²J. Then the relation between their de-Broglie wavelengths is

a)

$\lambda p\ =\ \lambda e$

b)

$\lambda p\ <\ \lambda e$

c)

$\lambda p\ >\ \lambda e$

d)

$\lambda p\ =\ 2\lambda e$

39.

An electron entered in constant magnetic field at right angle and start moving in circular path of radius r. Time period of revolution is

a)

$\frac{qB}{2\pi m}$

b)

$\frac{2v}{B^2r^2}$

c)

$\frac{2\pi m}{qB}$

d)

$\frac{2\pi q}{mB}$

40.

Two electric bulbs, one of 200 volt 40 watt and the other 200 volt 100 watt are connected in a house wiring circuit

a)

they have equal currents through them

b)

the resistance of the filaments in both the bulbs is same

c)

the resistance of the filament in 40 watt bulb is more than the resistance in 100 watt bulb

d)

the resistance of the filament in 100 watt bulb is more than the resistance in 40 watt bulb

41.

A ball is thrown vertically upwards and returns along the same path. The graph shows how its height varies with time.

Which velocity-time graph describes this motion?

a)

A

b)

B

c)

C

d)

D

42.

To travel at a constant speed, a car engine provides 24 kW of useful power. The driving force of the car is 600 N. At what speed does it travel?

a)

2.5 ms^-1

b)

25 ms^-1

c)

4.0 ms^-1

d)

40 ms^-1

43.

An ideal gas is compressed at constant temperature. Which line of the table is correct?

a)

A

b)

B

c)

C

d)

D

44.

A straight wire is held perpendicular to the plane of the paper current flows through the wire directed out of the paper magnetic field around the wire is represented by

a)

Clockwise circular lines in the plane of paper

b)

Lines directed into the paper

c)

Anti-clockwise circular lines in the plane of paper

d)

Lines parallel to the wire

45.

The diagram shows a parallel combination of three resistors. The total resistance of the combination is 3 Ω.

What is the resistance of resistor X?

a)

2 Ω

b)

6 Ω

c)

3 Ω

d)

12 Ω

46.

α particles are highly ionizing due to

a)

Their greater energy

b)

Their high charge and low speeds

c)

Their greater mass

d)

Their greater density

47.

If the time of flight of projectile is doubled its height becomes

a)

Doubled

b)

Unchanged

c)

4times

d)

Halved

48.

The P.E gained by projectile when it reaches at maximum height is expressed by equation

a)

K.E_i cos²θ

b)

K.E_i sin²θ

c)

K.E_i tan θ

d)

K.E_i cot θ

49.

An $\alpha$ - Particle, a β – Particle and a $\gamma$ - Particle enter a uniform electric field of strength E between two plates P and Q. Which row correctly describe their deflections inside the electric field?

a)

A

b)

B

c)

C

d)

D

50.

The following represents a sequence of radioactive decays involving two $\alpha$ -particle and one $\beta$ -particle.

What is the nuclide X?

a)

$_{_{85}}^{^{213}}At$

b)

$_{_{82}}^{^{209}}Pb$

c)

$_{_{77}}^{^{215}}Ir$

d)

$_{_{85}}^{^{217}}Ti$

51.

A property of the progressive wave that does not depend upon other characteristics mentioned below is

a)

wavelength

b)

frequency

c)

amplitude

d)

wave velocity

52.

A solenoid has 20 turns/cm. The current necessary to produce magnetic field of 20mT inside solenoid is

a)

$\frac{5}{\pi}A$

b)

$\frac{25}{\pi}A$

c)

$\frac{50}{\pi}A$

d)

$\frac{100}{\pi}A$

53.

There will be no force experienced if

a)

Two parallel wires having current in same direction

b)

A positive charge projected perpendicular in magnetic field

c)

Two parallel wires having current in opposite direction

d)

A positive charge projected along axis of solenoid

54.

A body performing simple harmonic motion has a displacement x given by the equation x=30 sin 50 t, where t is the time in seconds. What is the frequency of oscillation?

a)

0.020 Hz

b)

8.0 Hz

c)

0.13 Hz

d)

30 Hz

Physics FLP-2 Test

Total questions: 54

Worksheet time: 1hrs 21mins

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