Question # 1

Which of the following factor will not affect the speed of sound i a medium.

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Temperature

Pressure

Humidity

Mass

Stationary waves only a discrete set of frequencies are set up in a medium. This fact is called.

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Harmonics

Overtones

Quantization of frequencies

Superposition of frequencies

Plane polarized light can be produced by

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Reflection

Refraction

Scattering of light

All of these

What will be the sound speed if the frequency is doubled.

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zero

Half

Double

Unchanged

A bat while flying determines the location and nature of object in his way by sending.

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Infrasonic waves

Ultrasonic waves

Supersonic waves

Ultraviolet waves

When white light is incident on a diffraction grating, the light that will eb deviated from central image will be.

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White

Yellow

Red

Blue

The maximum energy of photons emitted from ab X rays tube is certain to be increased by

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Increasing the voltage across the tube

Decreasing the voltage across the tube

Heating the metal target

Putting a barrier in the way of photons

The energy transported by a wave is proportional to the square of the.

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Wavelength of the wave

Period of the wave

Amplitude of the wave

Frequency of the wave

A plane of polarization is one in which

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vibrations take place

No vibrations take place

Longitudinal vibrations take place

Transverse vibrations take place

Newton proposed his corpuscular theory on the basis on

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Newton's rings

Polarization

Dispersion of white light

Rectilinear property of light

Which is the best sound source to produce a pure note.

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Tuning fork

Flute

Drum

Harmonium

When two waves travelling through the same medium arrive at the same point 180 ^o out of phase, they give rise to.

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Polarization

Destructive interference

Refraction

Constructive interference

The velocity of the wave could be increased by

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Reducing the amplitude

Decreasing the frequency

Increasing the period

Stretching the spring more

A girl standing 150 m in front of tall building fires a pistol A boy standing 350 m behind her hears two bangs 1 s apart from this information what is the speed of sound in air.

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150 m s-1

300 m s-1

280 m s-1

330 m s-1

Which of the following is not electromagnetic .

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x-rays

Gama rays

Cathood rays

Infrared rays

The ripple tank is used to study various features of

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Wave phenomenon

Interferences

Doppler's effect

Reverberation

Which of the following cannot be polarized.

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Ultraviolet rays

Radio waves

T.V waves

Sound waves

What is the change in path when sound wave is reflected from a rigid support.

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Lamda /2

Lamda

2 lamda

Zero

Beats occur due to

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Reflection

Refraction

interference

Diffraction

Frequency less than 120 Hz are known as

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Infrasonic

Ultra sonics

Super sonics

Infrared

Which type of oscillations produce resoncance.

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Free

Forced

Damped

All of these

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