Q.

A live wire is hidden in a wall. Its position can be located with the help of

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a

The position of the live wire cannot be located without breaking the wall.

b

watt-meter

c

moving coil galvanometer

d

magnetic needle

answer is C.

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Detailed Solution

When a magnetic needle or compass is placed near a current carrying conductor it always deflects. The location of the live wire can be obtained according to Oersted experiment

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