Power Systems
Plug setting of a relay can be altered by varying

 air gap of magnetic path.
 none of these.
 no. of ampere-turns.
 adjustable back up stop.

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Power Systems
The modern trend in electric power generation

 to have large size thermal plants near load centre.
 to have large size thermal plant located near coal fields.
 to have large number of small size thermal plants located at different places.
  none of above.

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