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Megan Nolan




Triple Physics Revision Notes:
Electromagnetic Induction



Electromagnets:

Any magnet has an electric field around it which is
strongest at its poles; the arrows showing current will
always point from North to South.

Electromagnets are more useful as you can turn the
magnetic force on and off, the strength…

Page 2

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Megan Nolan




Transformers are used to step up or step down the voltage of a power supply. Before the power is
released onto the national grid, the voltage
must be increased (meaning the current will
decrease) to increase the efficiency. The
voltage is stepped down again before
entering houses or…

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