Power Systems
For 132 kV system, the reactance and capacitance up to the location of the CB is 3 Ω and 0.015 μF respectively. The maximum value of RRRV is

  9.01 kV / μs.
 10.01 kV / μs.
 12.2 kV / μs.
 2.0 kV / μs.

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Power Systems
Half life is defined as

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

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