1
GATE EE 2017 Set 2
MCQ (Single Correct Answer)
+1
-0.3
An urn contains $$5$$ red balls and $$5$$ black balls. In the first draw, one ball is picked at random and discarded without noticing its colour. The probability to get a red ball in the second draw is
A
$${1 \over 2}$$
B
$${4 \over 9}$$
C
$${5 \over 9}$$
D
$${6 \over 9}$$
2
GATE EE 2017 Set 2
Numerical
+1
-0
Assume that in a traffic junction, the cycle of the traffic signal lights is $$2$$ minutes of green (vehicle does not stop) and $$3$$ minutes of red (vehicle stops). Consider that the arrival time of vehicles at the junction is uniformly distributed over $$5$$ minute cycle. The expected waiting time (in minutes) for the vehicle at the junction is _________.
Your input ____
3
GATE EE 2017 Set 2
MCQ (Single Correct Answer)
+1
-0.3
A phase-controlled, single-phase, full-bridge converter is fed from a $$230$$ $$V,$$ $$50$$ $$Hz,$$ $$AC$$ source. The fundamental frequency in $$Hz$$ of the voltage ripple on the $$DC$$ side is
A
$$25$$
B
$$50$$
C
$$100$$
D
$$300$$
4
GATE EE 2017 Set 2
MCQ (Single Correct Answer)
+1
-0.3
In the circuit shown, the diodes are ideal, the inductance is small, and $${{\rm I}_0} \ne 0.$$ Which one of the following statements is true? GATE EE 2017 Set 2 Power Electronics - Single and Three Phase Rectifier Question 46 English
A
$${D_1}$$ conducts for greater than $${180^ \circ }$$ and $${D_2}$$ conducts for greater than $${180^ \circ }$$
B
$${D_2}$$ conducts for more than $${180^ \circ }$$ and $${D_1}$$ conducts for $${180^ \circ }$$
C
$${D_1}$$ conducts for $${180^ \circ }$$ and $${D_2}$$ conducts for $${180^ \circ }$$
D
$${D_1}$$ conducts for more than $${180^ \circ }$$ and $${D_2}$$ conducts for $${180^ \circ }$$
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