ECAT Pre General Science Physics Chapter 8 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 8 Waves

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ECAT Pre General Science Physics Chapter 8 Waves

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Question # 1

It is possible to recognize a person by hearing his voice even if he is hidden behind a solid wall. This is due to the fact that his voice

Question # 2

If the length of a simple pendulum is 0.25 m its time period would be

Question # 3

Smaller the damping, greater will be the

Question # 4

The loudness and pitch of a sound note depends on

Question # 5

The characteristic of a body executing S.H.M is that its acceleration is

Question # 6

A heavily damped system has a fairly

Question # 7

transverse wave motion is possible in:

Question # 8

The waves which propagate out in space due to oscillation of electric and magnetic fields are known as

Question # 9

Which one is not produced by sound waves in air?

Question # 10

When a wave is travels from one place to another, it transfers:

Question # 11

The velocity of sound is greatest in

Question # 12

Longitudinal waves are also called:

Question # 13

Crests and troughs are formed in:

Question # 14

If two waves of length 50 cm and 51 cm produced 12 beats per second, the velocity of sound is

Question # 15

Which of the following does not exhibit S.H.M?

Question # 16

Which one of the following elasticizes is possessed by fluids:

Question # 17

The frequency of free vibrations is known as

Question # 18

The force which opposes the applied force producing the displacement in the spring is called

Question # 19

Smaller the damping, the resonance will be

Question # 20

The velocity of sound at same temperature is maximum in

Question # 21

In a resonance situation the amplitude of the motion may become extra ordinarily large, if

Question # 22

Laplace formula is derived from

Question # 23

If the displacement of a body executing S.H.M is plotted against time, then the curve is known as

Question # 24

It two waves of amplitude 'a' produce a resultant wave of amplitude a, then the phase difference between them will be

Question # 25

The waves produced in a microwave oven have frequency

Question # 26

A traveling wave has a shape of:

Question # 27

The number of vibrating body at any instant from its equilibrium position is called

Question # 28

A string is stretched between two points and is plucked at right angles to its length, the vibration produced is:

Question # 29

Which one of the following could be the frequency of ultraviolet radiation?

Question # 30

SI unit of frequency is

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 Fluids can transmit:
A. Transverse wave
B. Compressional wave
C. Both of them
D. None of them
2 In a resonance situation the amplitude of the motion may become extra ordinarily large, if
A. the driving force is large
B. the driving force is zero
C. the driving force may be feeble
D. all of them
3 Which one of the following elasticizes is possessed by fluids:
A. Young's elastic modulus (length)
B. Bulk elastic modulus (volume)
C. Modulus of rigidity (shape)
D. None of these
4 Which of the following is the longitudinal waves?
A. Sound waves
B. Waves on plucked string
C. Water waves
D. Light waves
5 Example of progressive wave is
A. transverse waves
B. longitudinal waves
C. both of them
D. none of them
6 The total energy of spring mass system is
A. zero
B. changing with time
C. constant
D. none of them
7 If a simple pendulum is shifted from karachi to K-2 cliff, its time period
A. remains the same
B. decreases
C. increases
D. none of them
8 In the production of beats by 2 waves of same amplitude and nearly same frequency, the maximum intensity to each of the constituent waves is
A. Same
B. 2 times
C. 4 times
D. 8 times
9 In the formula for finding the speed of waves in the spring, unit of m in SIn units is:
A. kg
B. kg-meter
C. kg/meter
D. Meter/kg
10 The velocity of sound in air not effected by changes in
A. Moisture contents in air
B. Temperature of air
C. The atmosphere pressure
D. The composition of air

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