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Q#1 Induction Machines GATE EE 2002 MCQ +2 marks -0.66 marks

A 440 V, 50 Hz, 6 poles and 960 rpm star connected induction machine has the following per phase parameters referred to the stator:

The magnetizing reactance is very high and is neglected. The machine is connected to the 440V, 50 Hz supply and a certain mechanical load is coupled to it. It is found that the magnitude of the stator current is equal to the rated current of the machine but the machine is running at a speed higher than its rated speed. Find the speed at which the machine is running. Also find the torque developed by the machine.

N=2040 rpm , T=368.66 N-m

N=1040 rpm , T=368.66 N-m

N=1040 rpm , T=268.66 N-m

N=2040 rpm , T=268.66 N-m

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Network Analysis 259 0 0
Signals and Systems 164 0 0
Control Systems 201 0 0
Analog Electronics 180 0 0
Digital Electronics 148 0 0
Electrical Machines 390 0 0
Power Electronics 237 0 0
Power Systems 343 0 0
EMFT EE 9 0 0
Measurement 152 0 0
Engineering Mathematics 225 0 0
General Aptitude 206 0 0