Magnetism

Fm = qvB

F = mv² / r

B = uqv / 2pi r

flux = ABcos 0

3 = change in flux / change in time

I induced = 3 / R

change in area = l (v * change in time)

3 = Blv     (moving rod)

angle in flux is between axis and magnetic field

Lenz’s law - field and current is in direction that opposes flux

flux changes when - filed in loop changes, loops moves in or out of a field, area or angle in loop changes

right hand rule - force, field, *direction / velocity / current) are all perpendicular

parallel wires in same direction attract

parallel wires in opp direction repel

for parallel wires, since electric field is circular, when one field goes in the other side will have = it going out vise versa