Figure P7-2 shows a small two-pole dc motor with eight rotor coils and 10 turns per coil. The flux per pole in this machine is 0.006 wb.

(a) If this motor is connected to a 12-V dc car battery, what will the no-load speed of the motor be?

(b) If the positive terminal of the battery is connected to the rightmost brush on the motor, which way will it rotate?

(c) If this motor is loaded down so that it consumes 600 W from the battery, what will the induced torque of the motor be? (Ignore any internal resistance in the motor.)

Transcribed Image Text:

N 万 7 。。 連 6 S N 万 7 。。 連 6 S

Answer rating: 100% (QA)

a Refer to Figure P72 in the textbook At no load the induced voltage is same as the terminal voltage ... View the full answer