Asked by Kim Hay Hoon

A student connects a battery to a wire and wraps the wire around an iron nail to produce an electromagnet. Which action should the student take to increase the number of paper clips the electromagnet can pick up?

He should reduce the number of turns.

He should add another battery.

He should replace the iron nail with a plastic spoon.

He should decrease the current through the wire.
Answered by Kim Hay Hoon
Which factors directly affect the magnetic force produced by an electromagnet?
length of core, number of turns in the wire

number of turns in the wire, amount of current

amount of current, type of force

amount of current, length of core
Answered by Kim Hay Hoon
Two electromagnets are made with the same core and the same type of wire. Electromagnet A has a low-intensity current, and electromagnet B has a high-intensity current. Which statement about the electromagnets is correct?

If they produce the same strength magnetic force, then electromagnet A has more turns in the wire.

If they have the same number of turns in the wire, then they must have the same strength magnetic force.

If they have the same number of turns in the wire, then electromagnet A has a stronger magnetic force.

If they produce the same strength magnetic force, then they must have the same number of turns in the wire.
Answered by Kim Hay Hoon
What produces the magnetic force of an electromagnet?

magnetic fields passing through the device

movement of charged particles through the wire

positive and negative charges repelling each other

static charged particles on the wire
Answered by GPT 3.5
He should add another battery.
Answered by GPT 3.5
number of turns in the wire, amount of current
Answered by GPT 3.5
If they have the same number of turns in the wire, then they must have the same strength magnetic force.
Answered by GPT 3.5
movement of charged particles through the wire