A dc motor is connected to a constant emf of 13.9 V. The resistance of its windings is 2.0 ?. At normal operating speed, the motor delivers 6.7 W of mechanical power.
(a) What is the initial current drawn by the motor when it is first started up?
A
(b) What current does it draw at normal operating speed?
A
(c) What is the back emf induced in the windings at normal speed?
V