Question # 1

Crests and trough are formed in.

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Longitudinal waves

transverse waves

Stationary waves

Compression waves

The distance between the consecutive nodes is

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the velocity of sound is maximum at 20 ^oC in

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Lead

Copper

Glass

Iron

Light waves are

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Longtail waves

Transvers waves

Stationary waves

Mechanical wave

Stars moving away from Earth show a

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Green shift

Blue shift

Red shift

Yellow shift

Which of the following is mechanical wave

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Heat

Light

Sound

None of these

Speed of sound in copper is

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38000 ms-1

3600 ms-1

3500 ms-1

3400 ms-1

A stationary waves is established din a string which vibrates in four segments at a frequency of 120 Hz, Its fundamental frequency is.

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15 Hz

30 HZ

60 Hz

480 Hz

Two tunign forks of frequencies 260 Hz and 256 Hz are sounded together , the number of beats per second is.

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2

258

516

4

the louder the sound, the greater will be its.

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Speed

Frequency

Amplitude

Wave length

When ever the path difference between the waves is integral multiple of half the wavelength, interference will be

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Constructive

Destructive

(-)ve

(+) ve

The Newton's formula for the speed of sound in air is

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The speed of sound in air would become double than ots speed at 10^oC at a temperature of.

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313 ^oC

586 ^oC

859^oC

899 ^oC

The distance between two consecutive crests of troughs is called

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Time period

Wave length

Frequency

Displacement

If the wave motion is 0.01 sec and wave speed is 100 ms-1 then frequency of wave is.

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0.5 Hz

1 Hz

10 Hz

100 Hz

Sound travel faster in

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CO2

H2

O2

He

Two waves of same frequency and moving in the same direction produces.

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Interference

Diffraction

Beats

Stationary waves

Radar system is an application of.

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Chemical effect

Electric effect

Magnetic effect

Doppler's effect

the example of mechanical waves is

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Water waves

Infrared waves

Radio waves

Ultraviolet waves

The distance between two consecutive trough is called.

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Displacement

Amplitude

Wave length

Wave front

The pitch of sound deepens upon

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Intensity of sound

Loudness of sound

Wavelength of sound

Frequency of sound

The portion of the wave above mean level is called.

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Node

Antinode

Crest

Trough

If 20 waves passes through he medium in 2 sec of 10 ms-1 then he wavelength is.

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200 m

2 m

1 m

0.5 m

When the amplitude of a wave is increase to doubled is energy.

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Remain the same

Increases 4 times

Increases by two times

Decreases by half

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