How could a lightbulb near an electromagnet, but not touching it, be lit? Is ac or dc required? Defend your answer.

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asked Nov 11, 2021 112k views

1 Answer

Petr Nalevka · Answer 1 · 2021-11-15T02:59:57+0000

Answer:

If the light bulb is connected to a wire loop that intercepts changing magnetic field lines from an electromagnet, voltage will be induced which can illuminate the bulb. Change is key, so to stay lit the electromagnet should be powered with AC.

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How could a lightbulb near an electromagnet, but not touching it, be lit? Is ac or dc required? Defend your answer.

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