GCSE SCIENCE PHYSICS HIGH SCHOOL - Electromagnetism - Induced Current - Induced Voltage

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Induced Current.

Just as a current flowing through a wire will produce a magnetic field,
so a wire moving through a magnetic field
will have a current flowing through it.
This is called induced current.

The same effect occurs in a stationary wire in a changing magnetic field.
It does not matter if the wire is moved near to a magnet
or a magnet is moved near a wire,
so long as one is moving in relation to the other.

A stationary wire in a magnetic field which is not changing
will not have a current induced in it.

You will sometimes see this effect described as induced voltage.
Strictly speaking, you will only get an induced current in the wire
if it is part of a complete circuit.
A wire which is unconnected at both ends
will have a difference in voltage between the ends (a potential difference)
but current can only flow when the wire is in a circuit.

Induced current is used in electricity generation and transformers.

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