An electromagnet is different from a permanent magnet because an
electromagnet ________.
is magnetic
can push and pull
can attract some metals
can turn on and off
Resistance to electricity is measured in ______.
watts
amps
volts
ohms
. An electromagnet works because _______.
moving electrons generate magnetic forces
alternating current completes a circuit
a generator is powerful
electrons flow through copper wire
2 answers
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