Ratio of starting torque to maximum torque - Induction Machines

Q.  If sst is the starting slip and sm is the slip for maximum torque, then the ratio of starting torque to the maximum torque is
- Published on 23 Oct 15

a. sm / ( sm2 + 1 )
b. 2sm / ( sm2 + 2 )
c. 2sm / ( sm2 + 1 )
d. 1 / ( 1 + sm2 )

ANSWER: 2sm / ( sm2 + 1 )

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