ECAT Pre Computer Science Chapter 8 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 8 Waves

Try The MCQ's Test For ECAT Physics Chapter 8 Waves

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ECAT Physics Chapter 8 Waves

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Question # 1

If we increase the length of a simple pendulum four times, its time period will become

Question # 2

If the mass of the simple pendulum becomes double, its time period

Question # 3

In the same medium, velocity of the wave:

Question # 4

Time period of simple pendulum is independent of

Question # 5

The frequency of free vibrations is known as

Question # 6

When two progressive waves of nearly same frequencies superimpose and give rise to beats, then

Question # 7

A second's pendulum is a pendulum whose time period is

Question # 8

The waves produced in a microwave oven have wavelength.

Question # 9

The velocity of sound is greatest in

Question # 10

Energy is dissipated and consequently the energy mass system do not oscillate indefinitely because of

Question # 11

When half of the cycle of a body executing S.H.M is completed, then the phase of the vibration will be

Question # 12

The weight 'mg' of the bob is resolved into

Question # 13

Which one is not produced by sound waves in air?

Question # 14

Longitudinal waves are also called:

Question # 15

In the resonance condition, the amplitude of the oscillator becomes

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 For production of beats the two sources must have
A. Different frequencies and same amplitude
B. Different frequencies
C. Different frequencies, same amplitude and same phase
D. Different frequencies and same phase
2 An object undergoes S.H.M has maximum acceleration when its displacement form the means position
A. maximum
B. zero
C. half of the maximum value
D. one third of the maximum value
3 When a mass 'm' is pulled slowly, the spring stretches by an amount x0,then the average force would be
A. F= Kx0
B. F=1/2Kx0
C. F=2Kx0
D. F=4Kx0
4 In the same medium, velocity of the wave:
A. Goes on increasing
B. Remains constant
C. Goes on decreasing
D. None of these
5 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
6 A weakly damped system has fairly
A. sharp resonance curve
B. flat resonance curve
C. both of them
D. none of them
7 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
8 A physical system under going forced vibrations is known as
A. Simple harmonic oscillator
B. Compound harmonic oscillator
C. Physical harmonic oscillator
D. driven harmonic oscillator
9 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
10 Mechanical waves on the surface of a liquid are
A. Transverse
B. Longitudinal
C. Torsional
D. both transverse and longitudinal

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