1
GATE EE 2014 Set 2
+2
-0.6
A single-phase $$SCR$$ based $$ac$$ regulator is feeding power to a load consisting of $$5\,\,\Omega$$ resistance and $$16$$ $$mH$$ inductance. The input supply is $$230$$ $$V,$$ $$50$$ $$Hz$$ $$ac.$$ The maximum firing angle at which the voltage across the device becomes zero all throughout and the $$rms$$ value of current through $$SCR,$$ under this operating condition, are
A
$${30^0}$$ and $$46$$ $$A$$
B
$${30^0}$$ and $$23$$ $$A$$
C
$${45^0}$$ and $$23$$ $$A$$
D
$${45^0}$$ and $$32$$ $$A$$
2
GATE EE 2014 Set 2
Numerical
+1
-0
A single phase induction motor draws $$12MW$$ power at $$0.6$$ lagging power. A capacitor is connected in parallel to the motor to improve the power factor of the combination of motor and capacitor to $$0.8$$ lagging. Assuming that the real and reactive power drawn by the motor remains same as before, the reactive power delivered by the capacitor in MVAR is _______ .
3
GATE EE 2014 Set 2
+2
-0.6
The horizontally placed conductors of a single phase line operating at $$50$$ $$Hz$$ are having outside diameter of $$1.6$$ cm, and the spacing between centers of the conductors is $$6$$ m. The permittivity of free space is $$8.854 \times {10^{ - 12}}\,\,F/m.$$ The capacitance to ground per kilometer of each line is
A
$$4.2\,\, \times \,\,{10^{ - 9}}F$$
B
$$8.4\,\, \times \,\,{10^{ - 9}}F$$
C
$$4.2\,\, \times \,\,{10^{ - 12}}F$$
D
$$8.4\,\, \times \,\,{10^{ - 12}}F$$
4
GATE EE 2014 Set 2
+1
-0.3
Shunt reactors are sometimes used in high voltage transmission systems to
A
limit the short circuit current through the line
B
compensate for the series reactance of the line under heavily loaded condition
C
D
compensate for the voltage drop in the line under heavily loaded condition.
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