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POWER SYSTEMS

Power Systems
The per unit impedance Z(pu) is given by

 ZΩ* (MVA)b*100/(KV)²b
 ZΩ* (MVA)b/((KV)²b *100)
 ZΩ* (kVA)b/(KV)²b
 ZΩ* (MVA)b/(KV)²b

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Power Systems
The per unit impedance of a circuit element is 0.30. If the base kV and base MVA are halved, then the new value of the per unit impedance of the circuit element will be

 0.30
 0.60
 0.0030
 0.0060

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Power Systems
The per unit value of a 2 ohm resistor at 100 MVA and 10 kV base voltage is

 0.2 pu
 4 pu
 0.5 pu
 2 pu

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Power Systems
For a 500 Hz frequency excitation, a 100 km long power line will be modelled as

 any of the above
 long transmission line
 shunt capacitor
 medium transmission line

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Power Systems
The charging current of a 400 kV line is more than that of a 220 kV line of the same length?

 True
 either 1 or 2
 False
None of these

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