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

At a certain instant a stationary transverse wave is found to have maximum kinetic energy. The appearance of string of that instant is

Question # 2

Decibel is unit of

Question # 3

If the length of second pendulum becomes four times then its time period will become

Question # 4

Two sound waves of slightly different frequencies propagating in the same direction produce beats due to

Question # 5

The waves produced in a microwave oven have wavelength.

Question # 6

The wave form of S.H.M will be

Question # 7

When a body is performing S.H.M., its acceleration is

Question # 8

Which one of the following is an example of resonance

Question # 9

Associated with the motion of a driven harmonic oscillator, there is a very striking phenomenon, know as

Question # 10

Of the following, the option ______ reminds of longitudinal waves.

Question # 11

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

Question # 12

The velocity of sound in air depends upon

Question # 13

The waves which propagate by the collision of material particles are known as

Question # 14

In transverse waves, the individual particles of the medium move:

Question # 15

Velocity of sound in vacuum (in m/s) is

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 The restoring force always directed towards the
A. extreme position
B. mean position
C. both of them
D. none of them
2 For a body executing S. H. M, its
A. momentum remains constant
B. potential energy remains constant
C. kinetic energy remains constant
D. total energy remains constant
3 The waves in which the particles of the medium have displacement along the direction of propagation of waves are called
A. longitudinal waves
B. transverse waves
C. non-mechanical waves
D. none of them
4 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
5 Which of the following is/are example/s if mechanical waves i.e. waves generated in _______:
A. Rope
B. Coil of spring
C. Water
D. All of them
6 The velocity of sound in air depends upon
A. Density and elasticity of gas
B. Pressure
C. Wavelength
D. Amplitude and frequency of sound
7 The time required to complete on vibration is called
A. frequency
B. total time
C. time period
D. velocity
8 The temperature at which the speed of sound becomes double as was at 27°C is
A. 273°C
B. 0°C
C. 927°C
D. 1027°C
9 A stationary sound wave has frequency 165 Hz (speed of sound in air = 330 m/s) then distance between two consecutive nodes is
A. 2 m
B. 1 m
C. 0.5 m
D. 4 m
10 The phase determines the
A. displacement
B. amplitude
C. frequency
D. state of motion of vibrating body

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