Question Part Points Submissions Used Tim is using a cordless electric weed trimmer with a dc motor to cut the long weeds in his back yard. The trimmer generates a back emf of 18.00 V when it is connected to an emf of 23.0 V dc. The total electrical resistance of the electric motor is 7.20 ?.
(a) How much current flows through the motor when it is running smoothly?
A
(b) Suddenly the string of the trimmer gets wrapped around a pole in the ground and the motor quits spinning. What is the current through the motor when there is no back emf?
A