Electro Magnetic Induction And Alternating Currents Question 500

Question: The back e.m.f. in a d.c. motor is maximum, when

Options:

A) the motor has picked up max speed

B) the motor has just started moving

C) the speed of motor is still on the increase

D) the motor has just been switched off

Show Answer

Answer:

Correct Answer: A

Solution:

  • The back e.m.f. in a motor is induced e.m.f, which is maximum, when speed of rotation of the coil is maximum.


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