ECAT Pre Engineering Physics Chapter 8 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 8 Waves

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

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Physics ECAT Pre Engineering Chapter 8 Waves

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Question # 1

Two sources of sound are said to be coherent if

Question # 2

The principle of superposition states that

Question # 3

The time period of pendulums of different lengths would be

Question # 4

The time required to complete on vibration is called

Question # 5

The square of 0.4 is:

Question # 6

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

Question # 7

Time period of a simple pendulum depends upon the

Question # 8

If the external driving force is periodic with a period compareable to the natural period of the oscillator, then we get

Question # 9

Example of progressive wave is

Question # 10

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

Question # 11

Energy is not carried by

Question # 12

When a body is pulled away from its rest or equilibrium position and then released, the body oscillates due to

Question # 13

The frequency of free vibrations is known as

Question # 14

In the resonance condition, the amplitude of the oscillator becomes

Question # 15

In case of mechanical waves, we study the motion of

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 When a body is performing S.H.M., its acceleration is
A. inversely proportional to the displacement
B. directly proportional to the applied force
C. directly proportional to the amplitude
D. directly proportional to the displacement but in opposite direction
2 The velocity of sound in air depends upon
A. Density and elasticity of gas
B. Pressure
C. Wavelength
D. Amplitude and frequency of sound
3 SI unit of frequency is
A. second
B. hertz
C. revolution
D. vibrations/sec
4 A weakly damped system has fairly
A. sharp resonance curve
B. flat resonance curve
C. both of them
D. none of them
5 A heavily damped system has a fairly
A. sharp resonance curve
B. flat resonance curve
C. both of them
D. none of them
6 When sound waves travel from air to water which of these remains constant?
A. Velocity
B. Frequency
C. Wavelength
D. All the above
7 In stationary waves
A. Energy is uniformly distributed
B. Energy is minimum at nodes and maximum at antinodes
C. Energy is maximum at nodes and minimum at antidotes
D. Alternating maximum and minimum energy producing at nodes and antinodes
8 The phase determines the
A. displacement
B. amplitude
C. frequency
D. state of motion of vibrating body
9 When two waves with same frequency and constant phase difference phase difference interfere
A. There is a gain of energy
B. There is a loss of energy
C. The energy is redistributed and the distribution changes with time
D. The energy is redistributed and the distribution remains constant with time
10 Laplace formula is derived from
A. Isothermal change
B. Adiabatic change
C. Isobaric change
D. None of these

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