a) Current in the line b) Difference in potential of line c) Leakage of current d) Presence of magnetic flux Ans: (b)
a) (diameter of conductor).1/2 b) diameter of conductor. c) (diameter of conductor).2 d) (diameter of conductor).4 Ans: (c)
a) Is more pronounced for large conductors, high frequencies and close proximity b) Increases the resistance of the conductors and reduces the self reactance c) Is substantially eliminated with stranded conductors d) All of these Ans: (d)
a) Power losses b) Shunt admittances c) Series impedance d) None of these Ans: (b)
1. Skin effect 2. Corona effect 3. Proximity effect The effective resistance of conductor is increased by a) 1 only b) 2 and 3 only c) 1 and 3 only d) 1,2 and 3 Ans: (c)
a) 1 H. b) 0.1 H. c) 1 đť‘šH. d) 0.1 mH. Ans: (c)
a) 0.01 F. b) 0.1 F. c) 0.1ÎĽF. d) 0.01ÎĽF. Ans: (a)
a) 50 km. b) 150 km. c) 250 km. d) 500 km. Ans: (b)
a) (VR - VS)/VR Ă— 100 b) (VR - VS)/VS Ă— 100 c) (VS - VR)/VR Ă— 100 d) (VS - VR)/VS Ă— 100 Ans: (c)
a) Medium and long transmission lines b) Long transmission lines c) Medium transmission lines d) Short transmission lines Ans: (d)