successfully connected electricity and magnetism

aligned a straight wire with a compass pointing to Earth’s magnetic north

when current is present, the needle deflects perpendicular to the wire

when the current is reversed, the needle deflects in the opposite direction

“a charge moving through a straight conductor produces a circular magnetic field around the conductor”

to determine the direction of the magnetic field around a straight current-carrying conductor, use the right-hand rule: if you hold a straight conductor in your right

hand with your right thumb pointing in the direction of the conventional current, your curled fingers will point in the direction of the magnetic field lines

note: if you use the electron flow model instead, you must use your left hand

a cross-section of the wire is often shown

the current can either go into the page (x) or out of the page ()

this model is based on an arrow the magnetic fields get farther apart as

you move away from the wire to indicate that it is getting weaker

led to new technologies like motors and generators

demonstrated using electricity to produce magnetism

can produce magnetic fields with properties that can be controlled: can turn the magnetism on and off can change the direction of the magnetic field can change the strength of the magnetic field