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

An object undergoes S.H.M has maximum acceleration when its displacement form the means position

Question # 2

The time period of pendulums of different lengths would be

Question # 3

transverse wave motion is possible in:

Question # 4

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

Question # 5

A physical system under going forced vibrations is known as

Question # 6

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

Question # 7

If one end of a rubber cord is fixed with a support and the other end is wiggled by hand, the waves generated on the card are:

Question # 8

A stationary sound wave has frequency 165 Hz (speed of sound in air = 330 m/s) then distance between two consecutive nodes is

Question # 9

When temperature increase, the frequency of a tuning fork

Question # 10

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

Question # 11

A wave, which transfer energy by moving away from the source of disturbance is called a

Question # 12

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

Question # 13

The distance covered by the wave during one period is called its:

Question # 14

Example of progressive wave is

Question # 15

SI unit of frequency is

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 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
2 It two waves of amplitude 'a' produce a resultant wave of amplitude a, then the phase difference between them will be
A. 60°
B. 90°
C. 120°
D. 180°
3 The vibratory or oscillatory motion of a body is
A. translatory motion
B. back and forth motion about its mean position
C. free all motion
D. circular motion
4 Acceleration of the mass at any instant is given by
A. a=k/m x
B. a= - m/k x
C. a = - k/m x
D. a=m/k x
5 The resonance will be sharp, if the amplitude decreases rapidly at a frequency
A. equal to the resonant frequency
B. slight different from the resonant frequency
C. greatly different from the resonant frequency
D. any one 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 Time period of a simple pendulum depends upon the
A. length of the pendulum
B. acceleration due to gravity
C. none of them
D. both of them
8 The natural frequency of a pendulum which is vibrating freely, depends upon its
A. mass
B. length
C. material
D. all of them
9 A body is executing free vibrations when it oscilates
A. with the interference of an external force
B. without the interference of an external force
C. with the interference of an internal force
D. none of them
10 If the mass of the simple pendulum becomes double, its time period
A. increase
B. decreases
C. remains constant
D. none of them

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