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POWER SYSTEMS

Power Systems
The capacitance of an overhead transmission line increases with

 neither 1 nor 2
 increase in mutual geometrical mean distance
 increase in height of conductors above ground
 both 1 and 2

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Power Systems
The charging reactance of 50 km transmission line is 1500 Ω. What is the charging reactance for 100 km length of line?

 750 Ω
 1000 Ω
 3000 Ω
 1500 Ω

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Power Systems
Condition for maximum voltage regulation

 tanφ = X/R
 cosφ = R/X
 cosφ = X/R
 tanφ = R/X

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Power Systems
Condition for zero voltage regulation is

 cosφ = X/R
 cosφ = R/X
 tanφ = R/X
 tanφ = X/R

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Power Systems
Zero voltage regulation is possible only for

 lagging power factor
 unity power factor
All of these
 leading power factor

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