1
GATE EE 2001
+2
-0.6
The conductors of a $$10$$ km long, single phase, two wire line are separated by a distance of $$1.5$$ m. The diameter of each conductor is $$1$$ cm. If the conductors are of copper, the inductance of the circuit is
A
$$50.0$$ mH
B
$$45.3$$ mH
C
$$23.8$$ mH
D
$$19.6$$ mH
2
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
$$1:4:6$$
3
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
4
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
$$0.2$$ $$ln$$ $$(60/0.5)$$
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