Power Systems
Reflection coefficient of voltage is Rv

 2Zs/(Zs + Zl)
 (Zl - Zs)/(Zs + Zl)
 (Zs - Zl)/(Zs + Zl)
 2Zl/(Zs + Zl)

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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 to spiliting of a heavy nucleus.
  the time required for one half of isotope to decay.
 none of above.

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