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Power Systems

Power Systems
For n bus power system size of Y bus matrix is

 (n-1)×(n-2)
 (n-1)×(n-1)
 n×n
 (n-2)×(n-2)

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Power Systems
Consider a long, two wire line composed of solid round conductors. The radius of both conductors is 0.25 cm and distance between their centers is 100 cm. If this distance is doubled, then the inductance per unit length.

  Increase but does not doubled.
 Halves.
 Decrease but does not halves.
 Doubled.

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Power Systems
Power transmission lines are transposed to reduce

 proximity effect
 ferranti effect
 radio interference
 skin effect

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Power Systems
Due to proximity effect, the increase in conductor resistance is not negligible in

 underground cable
All of these
 overhead transmission lines
 communication lines

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Power Systems
A generating station which has a high investment cost and low operating cost is usually operated as a

 None of above.
 Peak load station.
 Base load station.
 Minimum load station.

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Power Systems
At slack bus, which one of the following combinations of variables is not specified?

 P and V
 V and δ
 P and Q
 Q and V

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