Question

1) Explain how practical electric motors are able to produce torque always in the same direction through 360 degrees of rotation of the motor. (See page 482 in your text, but note that there is an error in the diagram in the Application: Electric Motors box. The direction of rotation is incorrect. See if you can figure out why.)

Rotating loop 5 % Commutator Brushes Battery

2) If you needed to get more torque from the winch on your pickup and you had an extra 12 V battery what would you do, be specific ?