1
GATE EE 1999
MCQ (Single Correct Answer)
+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
$$0.2$$ $$ln$$ $$(60/0.5)$$
2
GATE EE 1999
MCQ (Single Correct Answer)
+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
3
GATE EE 1999
MCQ (Single Correct Answer)
+2
-0.6
A single phase AC distributor supplies two single phase loads as shown in figure. The voltage drop from A to C is
A
4.5 V
B
31.5 V
C
30 V
D
20 V
4
GATE EE 1999
MCQ (Single Correct Answer)
+2
-0.6
$$A$$ $$220$$ kV, $$20$$ km long, $$3$$-phase transmission line has the following $$A, B, C, D$$ constants. $$A=D=0.96$$$$\angle {3^0},$$ $$\,B = 55\angle {65^0}\,\,\Omega /$$ phase, $$\,C = 0.5 \times {10^{ - 4}}\angle {90^0}\,\,$$ $$S/$$phase. Its correct charging current per phase is
A
$$11/\sqrt 3 \,\,A$$
B
$$11$$ $$A$$
C
$$220$$ $$A$$
D
$$220/\sqrt 3 A.$$
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