Electro Magnetic Induction And Alternating Currents Question 239
Question: A motor having an armature of resistance $ 2\Omega $ is designed to operate at 220 V mains. At full speed, it develops a back e.m.f. of 210V. When the motor is running at full speed, the current in the armature is [UPSEAT 2002]
Options:
A) 5A
B) 105A
C) 110A
D) 215A
Show Answer
Answer:
Correct Answer: A
Solution:
$ i=\frac{E-e}{R}=\frac{220-210}{2}=\frac{10}{2}=5A $
