Electro Magnetic Induction And Alternating Currents Question 233
Question: Armature current in dc motor will be maximum when [CPMT 1986, 88; MP PET 1995]
Options:
A) Motor has acquired maximum speed
B) Motor has acquired intermediate speed
C) Motor has just started moving
D) Motor is switched off
Show Answer
Answer:
Correct Answer: C
Solution:
Motor e.m.f. equation $ E_{b}=V-I_{a}R_{a} $ At starting $ E_{b}=0, $ so $ I_{a} $ will be maximum.
BETA
