alleryStart learning →What is an electromagnet?
AA device that uses electric current to make a magnetic field
BA permanent magnet that never loses its field over time
CA compass needle mounted so it can rotate freely
DA material that is ferromagnetic only above its Curie temperature
Answer & Solution
Correct answer: A. A device that uses electric current to make a magnetic field
1. An electromagnet is a device that uses electric current to make a magnetic field.
2. Its magnetism is temporary and induced, lasting only as long as current flows, which is why it is described as temporarily induced.
3. A compass is a different device, one that responds to an existing field rather than generating one.
_Source: OpenStax Physics (CC BY 4.0), Ch 20 "Magnetism", section 20.1 Magnetic Fields, Field Lines, and Force_
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