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Three Phase Induction Motors

Three Phase Induction Motors
The starting torque of a squirrel cage induction motor is

Same as full load torque
Low
Slightly more than full load torque
Negligible

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Three Phase Induction Motors
If the rotor slots are made deeper, rotor resistance is ______

None of the listed here
Decreased at starting
Increased at starting
Increased under running conditions

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Three Phase Induction Motors
When the rotor of a 3-phase induction motor is blocked, the slip is _____

0
1
0.1
0.5

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Three Phase Induction Motors
If any two phases for an induction motor are interchanged

The motor will burn
The motor will run in reverse direction
The motor will not run
The motor will run at reduced speed

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Three Phase Induction Motors
The no load speed of an induction motor depends on

Both supply frequency and number of poles
The maximum flux/poles
The number of its poles
The supply frequency

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Three Phase Induction Motors
A 3 phase induction motor is running at 2% slip. If the input to rotor is 1000 W, then mechanical power developed by the motor is _______

500 W
980 W
20 W
200 W

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