A coil of insulated copper wire connected to a galvanometer . If a bar magnet is connected to it , what will happen when ( a ) it is pushed inside the coil ( b ) it is withdrawn from the coil ( c ) it is held stationary at the coil ?
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(a) galvonometer will defleat
(b) no effect to galvanometer
(b) no effect to galvanometer
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(i) when magnet is pushed near a bar magnet then it induces current due to electromagnetic induction.
(ii) When the bar magnet is withdrawn from inside the coil of the insulated copper wire again the current is induced in the coil but this time it is in reverse direction.
(iii) When a bar magnet is held stationary inside the coil then no current is induced that’s why galvanometer will show no deflection.
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