Question
Question: The armature of dc motor has 20 Ω resistance. It draws current of 1.5 ampere when run by 220 volts d...
The armature of dc motor has 20 Ω resistance. It draws current of 1.5 ampere when run by 220 volts dc supply. The value of back emf induced in it will be
A
150 V
B
170 V
C
180 V
D
190
Answer
190
Explanation
Solution
e = E – iR = 220 – 1.5 × 20 = 190 V.