Q17 of 25 Page 13

A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is

(i) pushed into the coil


(ii) held stationary inside the coil


(iii) withdrawn from inside the coil. ( CBSE 2015)

(i) As a bar magnet is pushed into the coil, a slight deflection for a very less time is observed in the galvanometer including the production of a momentary current in the coil.


(ii) When the bar magnet is held stationary inside the coil, there is no deflection in galvanometer indicating that no current is produced in the coil.


(iii) When the bar magnet is withdrawn from the coil, the deflection of galvanometer is in opposite direction showing the production of an opposite current.


Tagging ||| Physics||Magnetic Effects of Electric Current||Electromagnetic Induction

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