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Power Systems

Power Systems
In a 4*4 Y bus matrix the number of non zero elements are 12. Find the sparsity of the system?

 0.5
 0.25
 0.75
 1

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Power Systems
Radio interference occur in telecommunication line due to

 electro static induction
 both 1 and 2
 nether 1 nor 2
 electro magnetic induction

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Power Systems
Bundled conductors in EHV transmission lines

 increase inductance
 increase capacitance
 decrease inducatance
 decrease capacitance

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Power Systems
Power system network has a total power of 5000 MW at 50 Hz supplying to the different consumers. Frequency is varying at 1.5% per change of 2% load. Assume R =0.004 Hz/MW. Find the steady state frequency deviation if a sudden loss of 200 MW occur due to tripping of one of the transmission line?

 -0.52 Hz
 0.52 Hz
 0.48 Hz
 50 Hz

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Power Systems
Equal area criterion gives the information regarding

 absolute stability
 swing curves
 stability region
 relative stability

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Power Systems
Which of the following decides the insulation level of 400 kV, EHV line?

 skin effect
 lighting voltage
 radio interference
 switching over voltage

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