GATE EE 2014 Set 2 | GATE EE Year Wise Previous Years Questions

GATE EE 2014 Set 2

MCQ (Single Correct Answer)

-0.3

Assuming an ideal transformer, The Thevenin's equivalent voltage and impedance as seen from the terminals x and y for the circuit in figure are GATE EE 2014 Set 2 Electrical Machines - Transformers Question 80 English

GATE EE 2014 Set 2 Electrical Machines - Transformers Question 80 English

2sin(wt), 4 Ω

1sin(wt), 1 Ω

1sin(wt), 2 Ω

2sin(wt), 0.5 Ω

GATE EE 2014 Set 2

Numerical

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A single phase, 50 kVA, 1000 V/100 V two winding transformer is connected as an autotransformer as shown in the figure. GATE EE 2014 Set 2 Electrical Machines - Transformers Question 79 English

GATE EE 2014 Set 2 Electrical Machines - Transformers Question 79 English

The kVA rating of the autotransformer is _________.

Your input ____

GATE EE 2014 Set 2

MCQ (Single Correct Answer)

-0.3

A three-phase, 4-pole, self excited induction generator is feeding power to a load at a frequency $$f_1$$. If the load is partially removed, the frequency becomes $$f_2$$. If the speed of the generator is maintained at 1500 rpm in both the cases, then

$$f_1,f_2$$ > 50Hz and $$f_1$$ > $$f_2$$

$$f_1$$ < 50Hz and $$f_2$$ > 50Hz

$$f_1,f_2$$ < 50Hz and $$f_2$$ > $$f_1$$

$$f_1$$ > 50Hz and $$f_2$$ < 50Hz

GATE EE 2014 Set 2

MCQ (Single Correct Answer)

-0.3

In a constant V/f control of induction motor, the ratio V/f is maintained constant from 0 to base frequency, where V is the voltage applied to the motor at fundamental frequency f. Which of the following statements relating to low frequency operation of the motor is TRUE?

At low frequency, the stator flux increases from its rated value.

At low frequency, the stator flux decreases from its rated value.

At low frequency, the motor saturates.

At low frequency, the stator flux remains unchanged at its rated value.

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