electric motors

improvements to electric motors

-replace side magnets with curve magnets

-use an armature

—use brushes

commutator

ring with gaps on opposite sides

brushes

slide along as the commutator spins to switch contact with the sides

making electric motors faster

-increase the voltage to increase the current

-increase the force by adding more loops

-increase the magnetic field by using a stronger magnet

how the motor works

the forces acting on the coil cause the coil to turn either clockwise or anticlockwise…the forces produce a turning effect causing the motor to spin

alternating current

flow of electric charge that periodically reverses direction…uses a slip ring

direct current

low of electric charge in only one direction…uses a split ring