Question

Braddy connected the loose wire to the battery and created an electromagnet. He picked up 45 thumb tacks with his electromagnet, though his goal was to pick up 50 thumb tacks. What could Braddy do to increase the strength of his electromagnet and pick up more thumbtacks?

A: Use two batteries instead of one.
B: Use fewer coils of wire.
C: Replace the nail with a piece of steel.

Answer 1

A: Use two batteries instead of one.