engineering recuitment PSTCL ALM (Assistant Lineman) 2021 Mock Test Electrician and Wireman Electrical Machines DC Motors
Which of the following will develop the maximum power by a dc motor?
1
When the back emf is double the applied voltage
2
When the back emf is half the applied voltage
3
When the back emf is equal to the applied voltage
4
When the back emf is zero