Question # 1

The addition of two or more waves is termed as

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Interferences

Period

Echo

Polarization

A wave that remains in a constant position is called.

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Standing wave

Transvers wave

Shock wave

Longitudinal wave

To produce beats it is necessary to use two waves.

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Travelling in opposite direction

Of slightly different frequencies

Of equal wavelengths

Of equal amplitudes

Which of the title for combining of notes that produce jarring effect on the ear.

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Noise

Melody

Harmony

Discord

Frequency less than 120 Hz are known as

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Infrasonic

Ultra sonics

Super sonics

Infrared

A point source of light is situated at large distance The nature of the wave front at the point will be.

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Cylindrical

Spherical

Plane

Ellipical

The amplitude of a vibrating body at resonance place in vacuum is.

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zero

Maximum

Minimum

Infinite

Two tuning forks have same natural frequency One of them is now loaded with wax. When both the forks are sounded together the will

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Produce interference

Produce vibrations

Remain in resonance

Produce beats

A stretched wire with clamped ends has a fundamental frequency of 1,000 Hz. What will be the new fundamental frequency if tension in the wire is increased by 2%

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980 Hz

1,000 Hz

1,010 Hz

1,020 Hz

When a monochromatic wave enters from one medium into another the property that remains unchanged.

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Amplitude

Velocity

Frequency

Nature of the wave

Beats are the result of.

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Interference

Doppler's effect

Ultrasound

Polarization

Which of the following is a transverse wave.

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Sound wave

Shock wave

Hair wave

Radiowave

A pendulum vibrates with a time period of 1 s which range of sound is produced by it

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Audible

Infrasonic

Ultrasonci

Super sonic

Which of the following gives discrete emission spectrum.

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Sun

Candle

Incandescent filament

Mercury vapour lamp

Increase in velocity of sound in air for 1 ^oC rise in temperature is.

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0.61 m s-1

1.61 m s-1

2.00 m s-1

61.0 m s-1

Which term is used for the persistence of sound in a hall.

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Resonance

Acoustics

Symphony

Reverberation

The heat frequency is the

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Sum of the two frequenceis

Produce of the two frequency

Difference of the two frequencies

Ratio of the two frequencies

The spectrum of radiation due to transitions between energy levels in an atom, other absorption or emission is called.

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Atomic spectrum

Molecular spectrum

Grating spectrum

Normal specturm

Which of the following forms of electromagnetic energy has the longest wavelength.

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Microwaves

Radio waves

Infrared waves

^{Visible light}

Which of the following cannot be polarized.

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Ultraviolet rays

Radio waves

T.V waves

Sound waves

The energy following per second through a unit area held perpendicular to the direction of wave is.

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The loudness of the sound waves

The pitch of the sound waves

The intensity level of sound waves

The intensity of sound waves

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