5.3. Electromagnetic effects
The following pictures show us how to create a magetic field with daily materials.
This effect can be used to pruduces movement, for example in electric motors.
To generate an electric current with a magnet, we can move the conductor or we can move the magnet.
5.4. Sound
We can transform elecric current into sound by using diverse electromechanical devices, such as bells. Some of these devices are based on the piezoelectric effect.
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