GATE EE 1999 | GATE EE Year Wise Previous Years Questions

GATE EE 1999

Subjective

-0

A three phase diode bridge is used to provide rectified output from a $$400V,$$ $$50$$ $$Hz,$$ $$3$$- phase supply to a $$R$$ $$-$$ $$L$$ load with $$10\,\,\Omega $$ resistance and $$300$$ $$mH$$ inductance.
Determine the
(a)$$DC$$ level of the output voltage
(b) $$RMS$$ value of the diode current
(c) $$RMS$$ value of the source current, and
(d) Apparent power drawn from the mains

GATE EE 1999

MCQ (Single Correct Answer)

-0.3

A $$PWM$$ switching scheme is used with a three phase inverter to

Reduce the total harmonic distortion with modest filtering

Minimize the load on the $$DC$$ side

Increase the life of the batteries

Reduce low order harmonics and increase high order harmonics

GATE EE 1999

MCQ (Single Correct Answer)

-0.3

The load carrying capability of a long AC transmission line is

Always limited by the conductor size

Limited by stability considerations.

Reduced at a low ambient temperatures.

Decreased by the use of bundled conductors of single conductors.

GATE EE 1999

MCQ (Single Correct Answer)

-0.3

Corona losses are minimized when

Conductor size is reduced.

Smooth conductor is reduced.

Sharp points are provided in the line hardware.

Current density in conductors is reduced.

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