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

The waves which propagate through the oscillations of material particles are known as:

Question # 2

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

Question # 3

The process in which energy is dissipated from the oscillating system is known as

Question # 4

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

Question # 5

The loudness and pitch of a sound note depends on

Question # 6

In stationary waves

Question # 7

Which one of the following is an example of resonance

Question # 8

Resonance occurs when one of the natural frequencies of vibration of the forced or driven harmonic oscillator

Question # 9

When the bob of simple pendulum is at mean position, its K.E will be

Question # 10

The portion of the water above its mean level forms a:

Question # 11

Data transmitted along glass-fiber cables is in the form of pulses of monochromatic red light each of duration 2.5 ns. Which of the following is the best estimate of the number of wavelength in each pulse?

Question # 12

An object undergoes S.H.M has maximum speed when its displacement from the mean position is

Question # 13

Such oscillations in which the amplitude decreases steadily with time, are called

Question # 14

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

Question # 15

Which one is not produced by sound waves in air?

Question # 16

SI unit of wave length is:

Question # 17

Time period of a simple pendulum depends upon the

Question # 18

The total energy of spring mass system is

Question # 19

The instantaneous velocity of a body moving along a circle is directed

Question # 20

The square of 0.4 is:

Question # 21

The bob of a simple pendulum is suspended by

Question # 22

The velocity of sound in air not effected by changes in

Question # 23

Shock absorber of the car is an example of

Question # 24

The expression of Hook's law is

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

The velocity of sound in air depends upon

Question # 29

The wave form of S.H.M will be

Question # 30

The vibratory motion of a body whose magnitude of acceleration is directly proportional to the magnitude of its displacement and is always directed towards the equilibrium position is called

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 Which of the following is not mechanical wave?
A. Sound wave
B. Light wave
C.
wave produced in spring
D. None of them
2 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
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 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
5 If a freely oscillating system is subjected to an external force, then
A. free vibrations will take place
B. the body will move with its natural frequency
C. forced vibrations will take place
D. none of them
6 The damping depends upon the
A. amplitude
B. sharpness
C. both of them
D. none of them
7 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
8 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
9 The principle of superposition states that
A. The total displacement due to several waves is the sum of the displacement due to those waves acting individually
B. Two stationary waves superimpose to give two progressive waves
C. A diffraction pattern consists of many interference patterns superimposed on one another
D. Two progressive waves superimpose to give a stationary wave
10 The ratio of velocity of sound in air at 4 atm pressure and that at 1 atm pressure would be
A. 1 : 2
B. 4 : 1
C. 1 : 4
D. 2 : 1

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