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

Question

Physics

Kristian Summers

5 October, 03:10

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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Titus Vance · 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.