GATE EE 1993 | GATE EE Year Wise Previous Years Questions

GATE EE 1993

MCQ (Single Correct Answer)

-0.3

A chopper operating at a fixed frequency is feeding an $$R$$-$$L$$ load. As the duty ratio of the chopper is increased from $$25\% $$ to $$75\% $$, the ripple in the load current

Remains constant

Decreases, reaches a minimum at $$50\% $$ duty ratio and then increases

Increases, reaches a maximum at $$50\% $$ duty ratio and then decreases

Keeps on increasing as the duty ratio is increased

GATE EE 1993

MCQ (Single Correct Answer)

-0.3

When a line commutated converter operates in the inverter mode

It draws both real and reactive power from the A.C supply

It delivers both real and reactive power to the $$A.C$$ supply

It delivers real power to the A.C supply

It draws reactive power from the $$A.C$$ supply

GATE EE 1993

MCQ (Single Correct Answer)

-0.3

A three phase overhead transmission line has its conductors horizontally spaced with spacing between adjacent conductors equal to 'd'. If now the conductors of the line are rearranged to form an equilateral triangle of sides equal to 'd' then

Average capacitance and inductance will increase

Average capacitance will increase and inductance will increase

Average capacitance will increase and inductance will decrease

Surge impedance loading of the line increases

GATE EE 1993

MCQ (Single Correct Answer)

-0.3

The transient stability of the power system can be effectively improved by

Excitation control

Phase shifting transformer

Single pole switching of circuit breakers

Increasing the turbine valve opening

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