Question # 1

The vibratory or oscillatory motion of a body is

Choose an answer

translatory motion

back and forth motion about its mean position

free all motion

circular motion

Laplace formula is derived from

Choose an answer

Isothermal change

Adiabatic change

Isobaric change

None of these

Progressive waves of frequency 300 Hz are superimposed in produced a system of stationary waves in which adjacent nodes are 1.5 m apart. What is the speed of the progressive waves?

Choose an answer

100 ms^-1

200 ms^-1

450 ms^-1

900 ms^-1

For transmission of both transverse and longitudinal waves, we can use:

Choose an answer

Solid

Gas

Plasma

None of these

Through which character we can distinguish the light waves from sound waves

Choose an answer

Interference

Refraction

Polarization

Reflection

The waves which propagate out in space due to oscillation of electric and magnetic fields are known as

Choose an answer

e.m. waves

mechanical waves

sound waves

water waves

The example of mechanical wave is

Choose an answer

waves in ropes

waves on water surface

waves in air

all of them

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

Choose an answer

displacement

frequency

amplitude

time period

SI unit of frequency is

Choose an answer

second

hertz

revolution

vibrations/sec

Which one of the following elasticizes is possessed by fluids:

Choose an answer

Young's elastic modulus (length)

Bulk elastic modulus (volume)

Modulus of rigidity (shape)

None of these

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

Choose an answer

Sound waves

Heat waves

Electromagnetic waves

Light waves

The temperature at which the speed of sound becomes double as was at 27°C is

Choose an answer

273°C

0°C

927°C

1027°C

The restoring force always directed towards the

Choose an answer

extreme position

mean position

both of them

none of them

The frequency of free vibrations is known as

Choose an answer

free frequency

forced frequency

natural frequency

un-natural frequency

The velocity of sound in air depends upon

Choose an answer

Density and elasticity of gas

Pressure

Wavelength

Amplitude and frequency of sound

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

Choose an answer

very small energy

very large energy

frictional forces

acceleration due to gravity

Which of the following is an example of a S.H.M?

Choose an answer

motion of a projectile

motion of a train along a circular path

motion of swing

electrons revolving sound the nucleus

What is frequency of radio waves transmitted by a station, if the wavelength of those waves is 300 m?

Choose an answer

1 MHz

10 Hz

1 GHz

100000 Hz

Time period of simple pendulum is independent of

Choose an answer

length

mass

acceleration due to gravity

none of them

The waves in which the particles of the medium have displacement along the direction of propagation of waves are called

Choose an answer

longitudinal waves

transverse waves

non-mechanical waves

none of them

As the bob of the pendulum moves to and fro which of the force is experienced by the bob

Choose an answer

its weight

tension in the string

viscous drag force by air

all of them

The time required to complete on vibration is called

Choose an answer

frequency

total time

time period

velocity

When a mass 'm' is pulled slowly, the spring stretches by an amount x_o, then the work done will be

Choose an answer

W=Kx_o

W=1/2Kx_o

W=1/2Kx²_o

W=4Kx_o

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

Choose an answer

45°

90°

135°

180°

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

Choose an answer

1.0 s

2.0 s

3.0 s

4.0 s

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

Choose an answer

Four time

Two times

Six times

Eight times

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

Choose an answer

In circles

Perpendicular to the direction of level

Parallel to the direction of level

None of these

When two waves with same frequency and constant phase difference phase difference interfere

Choose an answer

There is a gain of energy

There is a loss of energy

The energy is redistributed and the distribution changes with time

The energy is redistributed and the distribution remains constant with time

At 'resonance' the transfer of energy from deriving source to the oscillator is

Choose an answer

maximum

minimum

zero

none of them

It is possible to recognize a person by hearing his voice even if he is hidden behind a solid wall. This is due to the fact that his voice

Choose an answer

Has a definite pitch

Has a definite quality

Has a definite capacity

Can penetrate the wall

Two sources of sound are said to be coherent if

Choose an answer

The produce sounds of equal intensity

They produce sounds of equal frequency

They produce sound waves vibrating with the same phase

They produce sound waves with zero or constant phase difference all instant of time

More Classes

Other Links

ECAT Pre General Science Physics Chapter 8 Waves Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer