1
GATE EE 2010
MCQ (Single Correct Answer)
+1
-0.3
Consider two buses connected by an impedance of $$\left( {0 + j5} \right)\Omega .$$ The bus $$1$$ voltage is $$100$$$$\angle {30^ \circ }\,\,\,V,$$ and bus $$2$$ voltage is $$100\angle {0^ \circ }\,\,\,V,$$ The real and reactive power supplied by bus $$1,$$ respectively, are
A
$$1000$$ $$W,$$ $$268$$ VAR
B
$$-1000$$ $$W,$$ $$-134$$ VAR
C
$$276.9$$ $$W,$$ $$-56.7$$ VAR
D
$$-276.9$$ $$W,$$ $$56.7$$ VAR
2
GATE EE 2009
MCQ (Single Correct Answer)
+1
-0.3
For a fixed value of complex power flow in a transmission line having a sending end voltage $$V$$, the real power loss will be proportional to
A
$$V$$
B
$${V^2}$$
C
$${1 \over {{V^2}}}$$
D
$${1 \over V}$$
3
GATE EE 2008
MCQ (Single Correct Answer)
+1
-0.3
An extra high voltage transmission line of length $$300$$ km can be approximate by a lossless line having propagation constant $$\beta = 0.00127$$ radians per km. then the percentage ratio of line length to wavelength will be given by
A
$$24.24$$%
B
$$12.12$$%
C
$$19.05$$%
D
$$6.06$$%
4
GATE EE 2007
MCQ (Single Correct Answer)
+1
-0.3
Consider the transformer connections in a part of a power system shown in the figure. The nature of transformer connections and phase shifts are indicated for all but one transformer. Which of the following connections, and the corresponding phase shift $$\theta ,$$ should be used for the transformer between $$A$$ and $$B$$?
A
Star $$-$$ $$\,\left( {\theta = {0^ \circ }} \right)$$
B
Star $$-$$ Delta $$\,\left( {\theta = {-30^ \circ }} \right)$$
C
Delta $$-$$ Star $$\,\left( {\theta = {30^ \circ }} \right)$$
D
Star $$-$$ Zigzag $$\,\left( {\theta = {30^ \circ }} \right)$$
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