Question

Which of the following statement are true for an electromagnet?

• A. Electromagnets are created by passing electricity through a conductor.
• B. Electromagnets are created by heating a conductor.
• C. Electromagnets are permanent magnets.
• D. Electromagnets are temporary magnets.

Answer 1

Answer: (A), (D)

The correct options are
A Electromagnets are created by passing electricity through a conductor.
D Electromagnets are temporary magnets.

1) Electromagnets are made by passing electricity through a conductor coiled around a magnetic material.
2) They possess magnetic field as long as there is electricity flowing in the conductor. Hence, electromagnets are temporary magnets.