Sully uses a battery and a coil of wire to create an electromagnet. Using the same materials, if he wants to increase the strength of his electromagnet, he must the number of loops in the coil of wire along its length. If he uses an additional battery, the strength of his electromagnet will.

The formula (there is one) that determines the strength of an electromagnet is

H = I*N/L

H is the strength

I is the current

N is the number of turns

L is the length.

Question One

As N goes up, so does the strength of the electromagnet. The formula tells you this. If he wants a stronger magnet, he must Increase the number of turns.

The resistance of the wire will likely stay the same when you don't add any more turns. So if you increase the voltage, you will increase the current. That means you get a stronger magnet.