Part 2: Magnet Review
Notice: Magnets have North and South poles. These poles create a magnetic field that is similar to electric fields. In fact, this is why you will hear the term electromagnetic field.
A magnetic field (β), changes with distance from an object, just like an electric field.
Notice too: Only when metal is looped, like in the simulation, can it produce a voltage (also known as an electromotive force). That voltage, which produces current (seen by the lightbulb). However, the looped wire needs a moving magnetic field (β) to do this. The change in the field’s strength causes the wire to induce voltage.
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