Physics
A mass of 20 kg is at a height of 8 m above the ground. Then the potential energy possessed by the body is: [Given g = 9.8 m/s2]

1568 C
1568 N
1568 J
1568 W

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Physics
In the process of magnetisation of a bar

Only some parts of the outer layers of the bar get magnetised
Only the ends of the bar get magnetised
Only the surface of the bar gets magnetised
The entire bulk of the bar gets magnetised

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Physics
In a conductor

The forbidden energy gap is very wide
There is no conduction band
The valence band and the conduction band overlap each other
The forbidden energy gap is very narrow

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