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Physics

Physics
Least audible sound for most of the human ear is :

0.0002 µ bar
5.0 µ bar
10.0 µ bar
0.005 µ bar

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Physics
What is the source of energy for the water cycle?

Sun
Animals
Rain water
Clouds

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Physics
An aircraft can perform aerobatic manoeuvres in a vertical loop because of

Centrifugal force
Centripetal force
Gravity
Weight

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Physics
The point where total mass of a body is supposed to be concentrated is known as

Centre of mass
Centre of motion
Centre of gravity
Dead centre

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Physics
What is the resistance (in ohm) of an electrical component if a current of 0.1 A passes through it on application of 5 V of potential difference across it?

0.5
1
100
50

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Physics
The unit of measurement of noise is

Acoustics
Hertz
Amplifier
Decibel

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