Question

What is the source of the magnetic field in a permanent magnet?

A. the spin and orbital motion of electrons

B. long-range electric currents that are always present in iron

C. net electric charge at the poles of a magnet

D. the motion of iron nuclei

Answer 1

it is option A

Answer 2

that's the Ampere theory

Answer 3

more explanation:
a circular current generates a magnetic dipole

Answer 4

ohhh ok! :) thanks!

Answer 5

and we can know the magnitude of the magnetic field due to a single magnetic dipole

Answer 6

:)

Answer 7

ahh okie yay!:) thanks!!