Class 10 Science | Electromagnetic Induction

Activity 11.5

Method

Connect a galvanometer to the two ends of the solenoid made earlier, a coil of insulated copper wire wound on a hollow tube.
Pass a bar magnet in and out of the hollow part of the solenoid.
Keep the bar magnet fixed in front of the solenoid, first with its north pole facing the coil and then with its south pole facing it.
Observe the position of the needle of the galvanometer when the north pole and when the south pole of the bar magnet enter the solenoid.
Note down the observation in the table.
Now move the bar magnet in and out quickly and compare what you see with the earlier observation.

Poles of the bar magnet	The process by which the poles of a bar magnet enter or exit the solenoid	The direction of deflection of the needle of the galvanometer
North pole	In	Left/right
South pole	Out

Discussion

What is the difference between the new observation and the previous observation that can be observed when the bar magnet is quickly moved in and out?

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