Description
Introduces simple scientific principles involving electricity and magnetism, and provides instructions for experiments that can be done at home to prove them.
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Switches are marvelous things - they control the most useful and convenient form of energy in our modern world, electricity. By powering machines and devices it turns night into day, stillness into motion, silence into sound and cold into hot - or the other way around. Yet electricity itself is invisible, so we study the science of it by its effects.
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