Free Printable Physics 1st Half Book Test

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Physics 1st Half Book Test

Total questions: 40

Worksheet time: 48mins

Name

Class

Date

A body of mass 5 kg is moving along a straight line with a velocity of 2ms–1. A variable force F started acting on it for a time period of 0.5s as shown in force-time curve. The final velocity of the block is

2 ms^–1

2.2 ms^–1

2.5 ms^–1

2.7 ms^–1

Vertical circular motion is an example of non-uniform motion and for completion of vertical circular motion the maximum velocity at the start of vertical motion from lowest point is

$\sqrt[]{gR}$

$=\sqrt[]{5gR}$

$\ge\sqrt[]{5gR}$

$\le\sqrt[]{5gR}$

A person can throw a stone to maximum distance of 80m the greatest height to which he can throw the stone is

100 m

80 m

50 m

20 m

Galileo writes that for angles of projection of a projectile (45^o + θ) and (45^o -θ) , the horizontal ranges described by the projectile are in the ratio of

2 : 1

1 : 2

1 : 1

(45^o + θ): (45^o -θ)

A force of 250 N acts on a body. The momentum acquired by the body is 125 kg m/s. what is the duration for which force acts on body

0.5 s

125 x 250 s

0.2 s

2 s

The fundamental frequency of an open organ pipe is n. The pipe is vertically immersed in water such that half of its length is submerged. The fundamental frequency of air column in this position will be:

n/3

n/2

When 110 J of heat is added to a gaseous system, internal energy increases by 40 J; the amount of work done is:

150 J

70 J

110 J

40 J

A bomb of mass 16 kg at rest explodes into two pieces of masses 4 kg and 12 kg. The velocity of the 12 kg mass is 4ms–1. The kinetic energy of the other mass is

144 J

288 J

192 J

96 J

An automobile traveling with a speed of 60 km/h, can brake to stop within a distance of 20 m. If the car is going twice as fast i.e. 120 km/h, the stopping distance will be (if breaking force is same)

60 m

20 m

4 m

80 m

10.

From top of tower two stones having masses in the ratio 1 : 2 are thrown, one straight up with speed V and second straight down with same speed v. Neglecting air resistance

The heavier stone hit the ground with higher speed

The lighter stone hit the ground with higher speed

Both stones hit the ground with same speed

Data insufficient

11.

If an agent consumes a power of 1kilo-watt in one hour, the work done is

One watt

One kilowatt-hour

One kilo-watt

Zero

12.

The power of the engine which accelerates a car of mass 800 kg to a speed of 72 km/hr from rest in 32 s is:

10 kW

15 kW

20 kW

5 kW

13.

When light enters from air to water, then its

Frequency increases and speed decreases

Frequency is same but the wave length is smaller in water than in air

Frequency is same but the wave length is larger in water than in air

Frequency and wavelength both decrease

14.

When a gas expands adiabatically

No energy is required for expansion

Energy is required and it comes from the wall of the container of the gas

Internal energy of the gas is used in doing work

Law of conservation of energy does not hold

15.

The length of the second hand of a watch is 1 cm. The velocity vector of the tip of the second hand in cm per second is

$2\pi$

$\frac{2\pi}{60}$

$\frac{2\pi}{12\times60}$

$\frac{2\pi}{24\times60}$

16.

The specific heat of a gas in an isothermal process is

Infinite

Zero

Negative

Remains constant

17.

A particle moves in a circle of radius 0.25 m at two revolutions per second. The acceleration of the particle in metre per $\sec ond^2$ is

$\pi^2$

$4\pi^2$

$8\pi^2$

$2\pi^2$

18.

When the amount of work done is 333 cal and change in internal energy is 167 cal, then the heat supplied is:

100 cal

300 cal

500 cal

700 cal

19.

An engine is moving on a circular track with a constant speed. It is blowing a whistle of frequency 500 Hz. The frequency received by an observer standing stationary at the centre of the track is

500 Hz

More than 500 Hz

Less than 500 Hz

More or less than 500 Hz depending on the actual speed of the engine

20.

A force of 10 N is applied on a body for 3 sec and the corresponding displacement is 6m. The power of the source is:

20 W

25 W

40W

50 W

21.

In a simple pendulum at mean position,

KE is maximum and PE is minimum

KE is minimum and PE is maximum

Both PE and KE are maximum

Both PE and KE are minimum

22.

The initial velocity of a body moving along a straight line is 7 $ms^{-1}$ . It has a uniform acceleration of 4 $ms^{-2}$ . The distance covered by the body in the 5th second of its motion is

25m

50m

35m

85m

23.

A simple harmonic motion has an amplitude A and time period T. the time required by it to travel from x=A to x=A/2 is:

T/6

T/3

T/4

T/2

24.

A football of mass 0.4 kg at rest acquire a speed of 20 m / sec when kicked. The impulse imparted to the ball is

4 Ns

8 Ns

5 Ns

20 Ns

25.

The displacement of SHM is written as x=xo sin θ if displacement is written by x = xo cos (wt) then initial phase constant will be equal to

0°

45°

90°

180°

26.

A source of sound is moving towards a stationary observer with 1/10 of the speed of sound. The ratio of apparent to actual frequency of sound is

10/9

11/9

9/11

11/10

27.

A gas is allowed to expand isothermally. The r.m.s. velocity of its molecules

Will increase

Will decrease

Will remain unchanged

Depends on other factors

28.

Which of the following statements in FALSE for a particle moving in a circle with a constant angular speed?

The acceleration vector points to the centre of the circle

The acceleration vector is tangent to the circle

The velocity vector is tangent to the circle

The velocity and acceleration vectors are perpendicular to each other

29.

A string of length 2 m fixed between two supports vibrates in two loops. The distance between node and antinode is:

50 cm

200 cm

100 cm

10 cm

30.

An object will continue accelerating until

Resultant force on it begins to decrease

Its velocity changes direction

The resultant force on it is zero

The resultant force is at right angles to its direction of motion

31.

When we kick a stone, we get hurt. Due to which one of the following properties of the stone does it happen

Inertia

Velocity

Reaction

Momentum

32.

A body executing S.H.M passes through its equilibrium. At this instant, it has

Maximum P.E

Maximum K.E

Minimum K.E

Maximum acceleration

33.

Which one of the following statement is true for speed v and acceleration a of a particle executing S.H.M

When v is maximum a is maximum

Value of a is zero, whatever may be the value of v

When v is zero a is zero

When v is maximum, a is zero

34.

At what temperature, the velocity of sound in a gas is thrice of its velocity at 0^oC

2184^oC

2457^oC

2184k

819k

35.

A passenger is sitting in a fast moving train. The engine of a train blows a whistle of frequency f. If the apparent frequency of sound heard by the passenger is f' than

f'<f

f'>f

f'= 1/f

f'= f

36.

The phenomenon which does not take place in sound waves is

Scattering

Diffraction

Interference

Polarization

37.

A thermodynamic system goes from state P,V to 2P, V, then the work done is

Zero

2PV

4PV

38.

A molecule of gas in a vessel having momentum ‘mv’ collide elastically with wall of a vessel, change in its momentum will be

–mV

-2mV

1/2mV

Zero

39.

A given quantity of an ideal gas is at pressure P and absolute temperature T, the isothermal bulk modulus of the gas is

2/3P

3/2P

40.

In which of the following curves the work done is maximum

100 %

Physics 1st Half Book Test

Total questions: 40

Worksheet time: 48mins

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