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Power Systems

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

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

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Power Systems
Which of the following grounding is not practically preferred for protection of equipments?

 reactance grounding
 resistance grounding
All of these
 isolated grounding

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Power Systems
In which of the following configuration power transferability is higher?

 triangular configuration
None of these
 same in both configuration
 horizontal configuration

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Power Systems
The capacitance of an overhead transmission line increases with

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

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Power Systems
Condition for zero voltage regulation is

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

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Power Systems
The insulation of the modern EHV lines is designed based on

 R × I.
 the lighting voltage.
  the switch voltage.
 corona.

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