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Flashcards in Electromagnetism Deck (3)
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1

State Faraday’s law of electromagnetic induction

The induced e.m.f is directly proportional to the rate of change of magnetic flux linkage

2

A magnet is moving into the centre of a flat circular coil of wire. A current is induced in the coil. Use ideas about energy conservation to state and explain the polarity of the face of the coil nearer the magnet

North Pole, there is a repulsive force between the magnet and coil and the work done against this repulsive force is transferred to electrical energy in the coil.

3

State Lena’s law

The direction of any induced e.m.f or current is in a direction that opposes the flux change that causes it.