Electro Magnetic Induction And Alternating Currents Question 501
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 emf of 210V. When the motor is running at full speed, the current in the armature is:
Options:
A) 3 A
B) 5 A
C) 7A
D) 10A
Show Answer
Answer:
Correct Answer: B
Solution:
- $ I=\frac{e_{1}-e_{2}}{R}=\frac{220-210}{2}=5A $
