Power Systems
The factor affecting run off are

 rain fall pattern, shape and size of catchment area.
  all of above.
 the topography and nature of soil in the catchment area.
 amount of vegetation and weather condition in the catchment area.

ANSWER DOWNLOAD EXAMIANS APP

Power Systems
Half life is defined as

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

ANSWER DOWNLOAD EXAMIANS APP