Bar Magnet What are the two factors that determine the strength of the magnetic

Question

Bar Magnet
What are the two factors that determine the strength of the magnetic field of a bar magnet? What determines the direction of the magnetic field of a bar magnet?

Electromagnet
What happens to the magnetic field if the direction of current in the wire loop is reversed in an electromagnet? What happens to the strength of the magnetic field as more electrons move (as current increases)?

When there is no voltage the electrons are still moving randomly. Since the number of electrons moving one direction is balanced by electrons moving the opposite direction then there is no net magnetic field. There is no magnetic field because there is no net flow of electrons. Predict what you think will happen if a magnet approaches a wire loop. Will the movement of electrons producing the same magnetic field be encouraged or discouraged? Will the movement of electrons producing the opposite magnetic field be encouraged or discouraged?

Explanation / Answer

1) 1). Increasing the number of turns of wire in the coil.

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