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Physics

Physics
Which among the following determines the pitch of a sound?

Frequency
Amplitude
Wavelength
Loudness

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Physics
Which of the following statements is true when we see ''rainbow' ?

The Sun remains behind us and we face raindrops
We face sun and raindrops
In light rainfall, we face Sun
The sky remains clear and the sun is at lower position in the sky

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Physics
Permissible noise level at Residential area during night time is :

75 dB (A)
80 dB (A)
45 dB (A)
55 dB (A)

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Physics
The velocity of heat radiation in vacuum is

Equal to that of sound
Less than that of light
Greater than that of light
Equal to that of light

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Physics
The unit for measuring electric power is the

Volts
Steridian
Watts
Watts

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Physics
If you look into a mirror and find that the image (your reflection) is smaller than you, then the type of the mirror is:

Convex mirror
Plano-concave mirror
Concave mirror
Plane mirror

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