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
 0.48 Hz
 -0.52 Hz
 50 Hz

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Power Systems
Half life is defined as

 the time required for full of atoms in a specimen disintegrate.
  the time required for one half of isotope to decay.
 none of above.
 the time required to spiliting of a heavy nucleus.

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