An induction motor can run at synchronous speed when
A. it is run on load
B. it is run in reverse direction
C. it is run on voltage higher than the rated voltage
D. e.m.f. is injected in the rotor circuit
Answer:D
An induction motor can run at synchronous speed when
A. it is run on load B. it is run in reverse direction C. it is run on voltage higher than the rated voltage D. e.m.f. is injected in the rotor circuit