A squirrel-cage induction motor runs at a full-load slip of

A squirrel-cage induction motor runs at a full-load slip of

A squirrel-cage induction motor runs at a full-load slip of 3.7 percent. The rotor current at starting is 6.0 times the rotor current at full load. The rotor resistance and inductance is independent of rotor frequency and rotational losses, stray-load losses and stator resistance may be neglected.
Expressing torque in per unit of the full-load torque, compute
a. The starting torque.
b. The maximum torque and the slip at which the maximum torque occurs.

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