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Physics

Physics
Which term is not associated with sound wave?

Candela
Mach
Hertz
Decibel

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Physics
Light travels at the fastest speed in:

vacuum
water
glass
hydrogen

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Physics
The term ''Isoneph' indicates the lines of equal

Salinity
Rainfall
Pressure
Cloudiness

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Physics
To measure the speed of an approaching car a police officer shines

Light waves on it
Microwaves on it
Ultra high frequency waves on it
Radio waves on it

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Physics
An electron and a proton starting from rest get accelerated through potential difference of 100 kV. The final speed of the electron and the proton are Ve and Vp respectively. Which of the following relations is correct?

Cannot be determined
Ve = Vp
Ve > Vp
Ve < Vp

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Physics
The device which transfer the signal from low resistance region to high resistance region is

Inductor
Transistor
Capacitor
Diode

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