If Rotor of Induction motor is rotating at synchronous speed the torque will be:
Correct answer: 1. Zero
Explanation: When the rotor of induction motor turns at synchronous speed the rotor bars would be stationary relative to the magnetic field. Inturn there would be no induced voltage. If induced voltage is zero then there would be no rotor current as well as no rotor magnetic field. Without rotors magnetic field the induced torque would be zero.