| Q.42 | A 400 V, 50 Hz, 4-pole, three phase induction motor cannot run at 1500 rpm because: | |
| Ans | A. At 1500 rpm there will be no emf inducted in the rotor circuit and hence no torque will be developed | |
| B. At 1500 rpm, torque developed by the rotor may not sufficient to rotate the rotor | ||
| C. An induction motor can run only at a speed higher than its synchronous speed | ||
| D. At 1500 rpm, the rotor will draw excessive current and may be harmful to the motor |
Correct Ans Provided: A
