GATE EE 2006 | GATE EE Year Wise Previous Years Questions

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GATE EE 2006

MCQ (Single Correct Answer)

-0.3

In transformers, which of the following statements is valid?

In an open circuit test, copper losses are obtained while in short circuit test, core losses are obtained.

In an open circuit test, current is drawn at high power factor.

In a short circuit test, current is drawn at zero power factor

In an open circuit test, current is drawn at low power factor.

GATE EE 2006

MCQ (Single Correct Answer)

-0.6

A $$220V$$ $$DC$$ machine supplies $$20$$ $$A$$ at $$200V$$ as a generator. The armature resistance is $$0.2$$ ohm. If the machine is now operated as a motor at same terminal voltage and current but with the flux increased by $$10\% ,$$ the ratio of motor speed to generator speed is

$$0.87$$

$$0.95$$

$$0.96$$

$$1.06$$

GATE EE 2006

MCQ (Single Correct Answer)

-0.3

In a $$DC$$ machine, which of the following statements is true?

Compensating winding is used for neutralizing armature reaction while inter pole winding is used for producing residual flux.

Compensating winding is used for neutralizing armature reaction while inter pole winding is used for improving commutation.

Compensating winding is used of improving commutation while inter pole winding is used for neutralizing armature reaction.

Compensating winding is used for improving commutation while inter pole winding is used for producing residual flux .

GATE EE 2006

MCQ (Single Correct Answer)

-0.3

Which of the following statements holds for the divergence of electric and magnetic flux densities?

Both are zero

These are zero for static densities but non zero for time varying densities

It is zero for the electric flux density

It is zero for the magnetic flux density

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