Question

11. A d.c. motor has an internal resistance of 0.1 ohm
. It draws 40 amp at full load from 120 V line. The e.mf.
developed by the motor is
(A) 120 V
(B) 116 V
(C) 4V
SQUA
(D) Zero​

Answer 1

Answer:

Aswer is 116volts

It is know has back emf

Explanation:

Here the feild resistance is 0.1 ohms so we can conclude that it's a DC SERIES MOTOR.

so BACK EMF eb = V - IA × RA

BACKEMF = GIVEN VOLTAGE - ARMATURE DROP

= 120 -(0.1×40)

= 116