Question

Select ALL the correct answers.
How can the strength of an electromagnet be increased?

by decreasing the amount of current
by increasing the amount of current
by decreasing the number of loops of wire
by increasing the number of loops of wire

Answer 1

Correct answers:
- by increasing the amount of current
- by increasing the number of loops of wire

Explanation: The magnetic field of an electromagnet is proportional to the current and to the number of turns (loops) of wire. Decreasing either reduces the field.