Electro Magnetic Induction And Alternating Currents Question 501

Question: A motor having an armature of resistance 2Ω . 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=e1e2R=2202102=5A


NCERT Chapter Video Solution

Dual Pane