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in Physics by (71.9k points)

A copper wire connected in a closed circuit is surrounded by a thick iron casing (Fig.) and is moved with it into the space between the poles of an electromagnet. The iron casing acts as a magnetic shield for the conductor. Will an electromotive force be induced in the conductor?

 

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An e.m.f. is induced since, as the conductor is moved into the space between the poles of the magnet, the number of magnetic lines of force passing through the circuit changes.

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