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Power Systems

Power Systems
Proximity effect is more in case of

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

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Power Systems
A transmission line has an impedance of (2+j6) Ω has voltage regulation of 10% at a load power factor of 0.8 lag. Find the voltage regulation for a load of 0.6 lead

 6.92%
 10%
 -6.92%
 -10%

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Power Systems
High capacity generators and motors are of

 any of the above
 star connected with grounding network
 delta connected network
 star connected network

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Power Systems
Which following statement are not true for line parameters R, L, G and C of transmission line

 LC = μ ε and RG = σ ε.
 G = 1/R where G is conductance of line.
 All of above.
 Both R and G depend on the conductivity of conductor forming the line.

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Power Systems
Mechanical energy is supplied to a DC generator at the rate of 4200 J / S. The generator delivers 32.2 Amp at 120 V. How much energy is cost per minute of operation

 23060 J.
  20060 J.
 25060 J.
  20160 J.

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Power Systems
Ferranti effect will not occur in which of the following transmission lines

 long transmission lines
All of these
 short transmission lines
 medium transmission lines

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