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Power Systems

Power Systems
Proximity effect is more in case of

None of these
 over head lines
 power cables
 same in both cases

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Power Systems
For loss less line, find the ratio of length to the wave length of a signal for a phase shift of 0.05 radians?

 2 × 10-3
 8 × 10³
 7.95 × 10-3
 7.95 × 10³

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Power Systems
Peterson coil is used in case of transmission line for

 reduce ferranti effect
 improve power factor
 increase the voltage level
 compensation of arcing grounds

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Power Systems
If the fault current is 2000 A, the relay setting is 50% and CT ratio is 400 : 5, then plug setting multiplier will be

 15.
 25.
 50.
 10.

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Power Systems
The positive (Z1), negative (Z2) and zero sequence (Z0) impedances of a transmission line follows the relation

 Z1 = Z2 = Z0
 (Z1 = Z2) > Z0
 (Z1 = Z2) < Z0
 any of the above

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Power Systems
The total number of strands in a ACSR conductor are 7, then find the layer number?

 3
 7
 5
 2

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