1
GATE EE 2005
MCQ (Single Correct Answer)
+2
-0.6
A fair coin is tossed $$3$$ times in succession. If the first toss produces a head, then the probability of getting exactly two heads in three tosses is
A
$${1 \over 8}$$
B
$${1 \over 2}$$
C
$${3 \over 8}$$
D
$${3 \over 4}$$
2
GATE EE 2005
MCQ (Single Correct Answer)
+1
-0.3
The output voltage waveform of a three - phase square-wave inverter contains
A
only even harmonics
B
both odd and even harmonics
C
only odd harmonics
D
only triple harmonics
3
GATE EE 2005
MCQ (Single Correct Answer)
+2
-0.6
The given figure shows a step $$-$$ down chopper switched at $$1$$ $$KHz$$ with a duty ratio $$D = 0.5.$$ The peak - peak ripple in the load current is close to GATE EE 2005 Power Electronics - Choppers and Commutation Techniques Question 32 English
A
$$10$$ $$A$$
B
$$0.5$$ $$A$$
C
$$0.125$$ $$A$$
D
$$0.25$$ $$A$$
4
GATE EE 2005
MCQ (Single Correct Answer)
+2
-0.6
Consider a phase $$-$$ controlled converter shown in figure The thyristor is fired at an angle $$\alpha $$ in every positive half cycle of the input voltage. If the peak value of the instantaneous output voltage equals $$230$$ $$V,$$ the firing angle $$\alpha $$ is close to GATE EE 2005 Power Electronics - Single and Three Phase Rectifier Question 37 English
A
$${45^ \circ }$$
B
$${135^ \circ }$$
C
$${90^ \circ }$$
D
$${83.6^ \circ }$$
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