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A coil of insulated copper wire is connected to a galvanometer. What would happen if a bar magnet is:
1. Pushed into the coil?
2. Withdrawn from inside the coil?
3. Held stationary inside the coil?  [3 MARKS]
 


Solution

Each point: 1 Mark

1. Due to change in magnetic flux linked with coil, the galvanometer shows deflection (say towards right).
2. Due to change in magnetic flux linked with coil, the galvanometer shows deflection (say towards left opposite to that in case one).
3. As it is stationary no change in magnetic flux linked with coil, so galvanometer shows no deflection

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