Mammoth Memory

Causing an electrical current in a solenoid

Not only can you pass a wire between a north and south pole of a magnet and induce an electrical current in a wire, you can also move the end of a magnet in a solenoid and create an electrical current. 

The electrical current that will be produced will be such that it will create a magnet that opposes the movement (Lenz's law).

So a magnet whose north pole travels towards a solenoid will produce a north pole.

Moving the north pole of a magnet towards a solenoid

Like two opposing north poles in a magnet the two north poles repel and will try to prevent the movement.

Two north poles repel each other

As the north pole of the magnet is then pulled away from the solenoid again the electrical current that will be produced will create a magnet that opposes this opposite movement. The solenoid will produce a south pole.

Moving the north pole of a magnet away from a solenoid

Like a north and south pole of a magnet trying to attract each other.

North and south poles attract

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