Recent content by Sarak

Oops, never mind. He meant take half of the back emf, not half the current.

Homework Statement The starter motor in an automobile has a resistance of 0.37 Ω in its armature windings. The motor operates on 12 V and has a back emf of 10 V when running at normal operating speed. A)How much current does the motor draw at its operating speed? B)How much current does...

Homework Statement The primary coil of an ideal transformer is connected to a 120-V source and draws 1.0 A. The secondary coil has 600 turns and supplies an output current of 5.0 A to run an electrical device. A) What is the voltage across the secondary coil? B) How many turns are in the...