Question

An electromagnet needs a magnetic metal core. To produce a magnetic field, what else is required?

A. A permanent magnet
B. A solenoid with current running through it
C. A second metal core
D. A solenoid with no current running through it ​

Answer 1

b

Step-by-step explanation:

Answer 2

B

Step-by-step explanation:

A solenoid is the wraps of conducting wire wrapped around the metal core .