Question

What factors affect the strength of the electromagnet?

Answer 1

an effect could be that the battery could be running out of juice or that there isnt enough wire on a nail on the electromagnet.

Step-by-step explanation:

Answer 2

Factors that affect the strength of electromagnets are the nature of the core material, strength of the current passing through the core, the number of turns of wire on the core and the shape and size of the core.