1
GATE EE 2000
+2
-0.6
A transmission line has equal voltages at the two ends, maintained constant by two sources. A third source is to be provided to maintain constant voltage (equal to end voltages) at either the midpoint of the line or at $$75$$% of the distance from the sending end. Then the maximum power transfer capabilities of the line in the original case and the other two cases respectively will be in the following ratios.
A
$$1:1:1$$
B
$$1:2:{1 \over {0.75}}$$
C
$$1:2:4$$
D
$$1:4:6$$
2
GATE EE 2000
+2
-0.6
The corona loss on a particular system at 50 Hz is 1 kW/km per phase. The corona loss at 60 Hz would be
A
1 kW/km per phase
B
0.83 kW/km per phase
C
1.2 kW/km per phase
D
1.13 kW/km per phase
3
GATE EE 1999
+2
-0.6
For a single phase overhead line having solid copper conductors of diameter $$1$$ cm, spaced $$60$$ cm between centers, the inductance in $$mH/km$$ is
A
$$0.05+0.2$$ $$ln$$ $$60$$
B
$$0.2$$ $$ln$$ $$60$$
C
$$0.05+0.2$$ $$ln$$ $$(60/0.5)$$
D
$$0.2$$ $$ln$$ $$(60/0.5)$$
4
GATE EE 1999
+2
-0.6
A 3-phase, 11 kV, 50 Hz, 200 kW load has a power factor of 0.8 lag. A delta connected 3-phase capacitor is used to improve the power factor to unity. The capacitance power phase of the capacitor in micro-farads is
A
3.948
B
1.316
C
0.439
D
11.844
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