Question

For a wire to cause a magnetic field, it must:A.be inside a motor.B.have a single magnetic pole.C.be near an insulator.D.have a current flowing through it.

Answer 1

Answer: D

Step-by-step explanation:

Circular magnetic field is produced around a wire when current flows through it. This magnetic field deflects the needle of a magnetic compass. Thus, the correct option is

D. have a current flowing through it.