Operating Characteristics of Induction Motors

A 10 kW, 400 V, 3-phase, 4-pole, 50 Hz induction motor develops the rated output at rated voltage with its slip rings shorted.
The maximum torque equal to twice the full load torque occurs at the slip of 10% with zero external resistance in the rotor circuit.
The slip at the full load torque will be

The stable point in the operation of the induction motor is

Mark the stable operating point when the load torque shifts from Tl1 to Tl2.

Introducing the external resistance increases
(i) speed
(ii) output power
(iii) starting torque

A 10 kW, 400 V, 3-phase, 4-pole, 50 Hz induction motor develops the rated output at rated voltage with its slip rings shorted.
The maximum torque is twice the full load torque occurs at the slip of 10% with zero external resistance in the rotor circuit.
An external resistance is now tripled in the rotor circuit. Then the slip at which maximum torque occur for the same load torque is

A 10 kW, 400 V, 3-phase, 4-pole, 50 Hz induction motor develops the rated output at rated voltage with its slip rings shorted.
The maximum torque is twice the full load torque occurs at the slip of 10% with zero external resistance in the rotor circuit.
The speed at the full load torque will be

A 3-phase, 50 Hz, 6-pole induction motor has a shaft output of 10kW at 930 rpm. Friction and windage losses is 1% of the output.Total stator losses is 600W.
The rotor input is

Introducing the external resistance decreases
(i) speed
(ii) output power
(iii) starting torque

At which point shall the induction machine be operated to attain a stable operation?

A 10 kW, 400 V, 3-phase, 4-pole, 50 Hz induction motor develops the rated output at rated voltage with its slip rings shorted. The maximum torque is twice the full load torque occurs at the slip of 10% with zero external resistance in the rotor circuit. An external resistance is now tripled in the rotor circuit. Then the stator current will

For a three phase induction motor, maximum torque is double the full load torque and starting torque is 1.6 times the full load torque. To get a full load slip of 5%, percentage reduction in the rotor resistance should be

A 3-phase, 50 Hz, 6-pole induction motor has a shaft output of 10kW at 930 rpm. Friction and windage losses is 1% of the output.Total stator losses is 600W.
The rotor input is

The stable point to use the induction motor possesing the below characteristic.