1
GATE EE 2011
MCQ (Single Correct Answer)
+2
-0.6
Given $$f(t)$$ and $$g(t)$$ as shown below

The laplace transform of $$g(t)$$ is

A
$${1 \over s}\left[ {{e^{ - 3s}} - {e^{ - 5s}}} \right]$$
B
$${1 \over s}\left[ {{e^{ - 5s}} - {e^{ - 3s}}} \right]$$
C
$${{{e^{ - 3s}}} \over s}\left[ {1 - {e^{ - 2s}}} \right]$$
D
$${1 \over s}\left[ {{e^{ - 5s}} - {e^{ - 3s}}} \right]$$
2
GATE EE 2011
MCQ (Single Correct Answer)
+2
-0.6
A point $$z$$ has been plotted in the complex plane as shown in the figure below

The plot of the complex number $$w = 1/z$$

A
B
C
D
3
GATE EE 2011
MCQ (Single Correct Answer)
+1
-0.3
Circuit turn-off time of an $$SCR$$ is defined as the time
A
taken by the $$SCR$$ turn of
B
required for the $$SCR$$ current to become zero
C
for which the $$SCR$$ is reverse biased by the commutation circuit
D
for which the $$SCR$$ is reverse biased to reduce its current below the holding current
4
GATE EE 2011
MCQ (Single Correct Answer)
+2
-0.6
The input voltage given to a converter is
$${V_i} = 100\sqrt 2 \,\,\,\sin \,\,\,\left( {100\pi t} \right)\,\,V$$
The current drawn by the converter is
$${i_i} = 10\sqrt 2 \,\,\,\sin \,\,\,\left( {100\pi t - {\pi \over 3}} \right)\,\, + 5\sqrt 2$$
$$\sin \left( {300\pi t + {\pi \over 4}} \right)\,\, + \,\,2\sqrt 2 \,\,\sin \left( {500\pi t - {\pi \over 6}} \right)A$$

The input power factor of the converter is

A
$$0.31$$
B
$$0.44$$
C
$$0.5$$
D
$$0.71$$
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