Questions
A live wire is hidden in a wall. Its position can be located with the help of
a
watt-meter
b
moving coil galvanometer
c
magnetic needle
d
The position of the live wire cannot be located without breaking the wall.
detailed solution
Correct option is C
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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