Which feature of electromagnets makes them more useful than permanent
magnets in many modern technologies?
O A. The current can be adjusted to control the strength of the
magnetic field.
B. The strength of the magnetic field is more consistent in
electromagnets.
O C. Electromagnets are not dependent on a power supply.
O D. Electromagnets cannot be turned on and off.
Answers: 2
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Which feature of electromagnets makes them more useful than permanent
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