Power Systems
A transmission line has self and mutual impedances of 0.8 pu and 0.2 pu. Find the positive, negative and zero sequence impedances respectively?

 0.8, 0.6 and 1.2 pu
 0.6, 0.8 and 1.2 pu
 0.6, 0.6 and 1.2 pu
 0.8, 0.8 and 1.2 pu

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Power Systems
Half life is defined as

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

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