Power Systems
The water from a catchment is 60*106 cu m annually and hydro station has head of 40 m. Assuming ideal generator and turbine, the power that can be theoretically generated is

 500 kW
 750 kW
 300 kW
 250 kW

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Power Systems
Half life is defined as

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

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