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Physics

Physics
Which term is not associated with sound wave?

Candela
Hertz
Decibel
Mach

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Physics
If density of oxygen is 16 times that of hydrogen, what will be their corresponding ratio of velocity of sound?

0.052777777777778
0.16736111111111
0.084027777777778
0.044444444444444

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Physics
For which of the following substances, the resistance decreases with increase in temperature?

Copper
Pure silicon
Platinum
Nichrome

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Physics
Planck's constant has the dimensions of :

Angular momentum
Force
Linear momentum
Energy

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Physics
If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same:

Momentum
Velocity
Kinetic energy
Acceleration

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Physics
The device which converts AC to DC is

None of these
Oscillator
Amplifier
Rectifier

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