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

Question

Physics

Nathalia Hendricks

29 January, 03:06

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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Answers (1)

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Campbell Shea · Answer 1

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.