Consider the AC motor described in Example 22.9. You want to make this motor more powerful; that is, you want it to produce a larger torque. Evaluate the following proposed design changes.
(a) If the number of turns in the coil were increased from one to five, how would the torque change?
(b) If the size of the rotating coil were increased to L = 30 cm, how would the torque change?
(c) If the magnetic field strength were increased to B = 2.5 T, how would the torque change?
(d) If all three of these changes were made, by what factor would the total torque increase?