Question

manipulating the strength of an electromagnet
simple electromagnet
predict what would happen to the strength of the
electromagnet in each situation.
using a battery with a higher voltage:
weaker force of attraction
wrapping the wire around the nail only three times:
changing the direction of the current by reversing the
iron nail:
than horizontally:

Explanation:

The strength of an electromagnet depends on factors like the number of wire turns and the current (which is related to voltage). Fewer wire turns (wrapping only three times) reduce the magnetic field strength.

Answer:

weaker force of attraction