What factor determines the direction of induced e.m.f?

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Solution

The direction of induced current and emf is given by Lenz's law.
Lenz's law states that the induced current due to the induced emf always flow in such a direction as to oppose the change causing it. Hence, the change of the magnetic flux linked with it is an important factor that determines the direction of the induced emf.

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(a) Describe briefly one way of producing an induced e.m.f.
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