Discussion Forum : Polyphase Induction Motors
Question - The torque of a rotor in an induction motor under running condition is maximum
Options:
A .  At the unit value of slip
B .  At the zero value of slip
C .  At the value of the slip which makes rotor reactance per phase equal to the resistance per phase
D .  At the value of the slip which makes the rotor reactance half of the rotor
Answer: Option C

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