1
GATE EE 2008
MCQ (Single Correct Answer)
+2
-0.6
In the circuit shown in the figure, the switch is operated at a duty cycle of $$0.5.$$ A large capacitor current is connected across the load. The inductor current is assumed to be continuous. GATE EE 2008 Power Electronics - Choppers and Commutation Techniques Question 10 English

The average voltage across the load and the average current through the diode will respectively be

A
$$10$$ $$V,$$ $$2A$$
B
$$10$$ $$V,$$ $$8A$$
C
$$40$$ $$V,$$ $$2A$$
D
$$40$$ $$V,$$ $$8A$$
2
GATE EE 2008
MCQ (Single Correct Answer)
+2
-0.6
A single phase full bridge converter supplies a load drawing constant and ripple free load current. If the triggering angle is $${30^ \circ },$$ the input power factor will be
A
$$0.65$$
B
$$0.78$$
C
$$0.85$$
D
$$0.866$$
3
GATE EE 2008
MCQ (Single Correct Answer)
+2
-0.6
A three phase fully controlled bridge converter is feeding a load drawing a constant and ripple free load current of $$10$$ $$A$$ at a firing angle of $${30^ \circ }.$$ The approximate Total Harmonic Distortion $$(\% \,\,THD)$$ and $$r.m.s$$ value of fundamental component of the input current will respectively be
A
$$31\,\% $$ and $$6.8$$ $$A$$
B
$$31\,\% $$ $$7.8$$ $$A$$
C
$$66\,\% $$ $$6.8$$ $$A$$
D
$$66\,\% $$ $$7.8$$ $$A$$
4
GATE EE 2008
MCQ (Single Correct Answer)
+2
-0.6
A lossless power system has to serve a load of $$250$$ $$MW.$$ There are two generators ($$G1$$ and $$G2$$) in the system with cost curves $${C_1}$$ and $${C_2}$$ respectively defined as follows:
$${C_1}\left( {{P_{G1}}} \right) = {P_{G1}} + 0.055 \times P_{G1}^2$$
$${C_2}\left( {{P_{G2}}} \right) = 3{P_{G2}} + 0.03 \times P_{G2}^2$$
Where $${P_{G1}}$$ and $${P_{G2}}$$ are the MW injections from generator $${G_1}$$ and $${G_2}$$ respectively. Thus, the minimum cost dispatch will be
A
$${P_{G1}} = 250\,MW;\,\,{P_{G2}} = 0\,MW$$
B
$${P_{G1}} = 150\,MW;\,\,{P_{G2}} = 100\,MW$$
C
$${P_{G1}} = 100\,MW;\,\,{P_{G2}} = 150\,MW$$
D
$${P_{G1}} = 0\,MW;\,\,{P_{G2}} = 250\,MW$$
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