Question

If you make an electromagnet using a battery circuit and a steel nail, how can you increase its magnetic strength?

A.
replace the nail with a copper rod

B.
wrap more coils of wire around the nail

C.
use a longer nail

D.
remove the plastic insulation from the wire coil

Answer 1

B.

Step-by-step explanation:

B. Wrap more coils of wire around the nail

Increasing the number of coils in an electromagnet increases the strength of the magnetic field.

Answer 2

B. Wrap more coils of wire around the nail
Increasing the number of coils in an electromagnet increases the strength of the magnetic field.