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Physics

Physics
Which of the following waves cannot be polarised?

Ultra violet
Ultrasonic
Infrared
Radio

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Physics
The device which converts sound energy into electrical energy is called

Microphone
Speaker
Transmitter
Amplifier

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Physics
The redness in atmosphere at Sunrise and Sunset is due to :

Scattering of light
Dispersion of light
Refraction of light
Reflection of light

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Physics
Microphone is a device which transforms the

Current signal into sound signal
Light signal into sound signal
Sound signal into light signal
Sound signal into current signal

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Physics
The colours of stars depend on their

Temperature
Radius
Distance
Atmospheric pressure

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Physics
The scientist who first sent electromagnetic waves to distant places is

James Clerk Maxwell
Thomas Alva Edison
John Logie Baird
Heinrich Hertz

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