What makes an electromagnet different than a permanent magnet Options: A . &nbspit can be turned on and off B . &nbspAll of above C . &nbspits strength can be increased and decreased D . &nbspits polarity can be reversed

What makes an electromagnet different than a permanent magnet

Question

What makes an electromagnet different than a permanent magnet

Options:

A . it can be turned on and off

B . All of above

C . its strength can be increased and decreased

D . its polarity can be reversed

Answer: Option B

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