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ELECTRICAL MACHINES

Electrical Machines
In a 1-phase induction motor, if the forward torque slip is S, what is the backward torque slip?

 2-S
 S
 1/S
 1-S

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Electrical Machines
A 4 pole 50 Hz 1-phase induction motor is running at 1470 rpm. Find the forward and backward slips?

 0.02, 1.98
 0.04, 0.96
 0.02, 0.98
 0.04, 1.96

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Electrical Machines
If we increase the rotor reactance value, the maximum torque will

 increase
 decrease
 not changed
None of these

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Electrical Machines
From no load to full load the slip will

 slightly increase.
 slightly decrease.
 not change.
None of these

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Electrical Machines
A 440 V, 3-phase, 10 pole and 50 HZ synchronous motor delivering a torque of 50 N-m, delivers a power of

 3000W
 1000W
 100W
 500W

ANSWER DOWNLOAD EXAMIANS APP
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