Physics
In the process of magnetisation of a bar

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

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Physics
Stationary wave is formed by

A transverse wave superposing a longitudinal wave
Two waves of same frequency travelling in the opposite direction
Two waves of same frequency travelling in the same direction
Two waves of the same speed superposing

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