Question

lisa made the electromagnet shown. what can lisa do to increase the strength of the electromagnet? she can use a nail with weaker magnetic properties. she can change the direction of the nail. she can increase the number of wire loops. she can reduce the current in the wire.

Explanation:

The strength of an electromagnet is related to the number of wire - loops, the current in the wire, and the magnetic properties of the core. Increasing the number of wire loops increases the magnetic field strength. Using a nail with weaker magnetic properties would decrease strength, changing the nail's direction has no effect on strength, and reducing the current would decrease strength.

Answer:

She can increase the number of wire loops.