Power Systems
The fact that current density is higher at the surface when compared to centre is known as

All of these
 skin effect
 carona
 proximity effect

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Power Systems
In a pressurized water reactor

 water is used at high pressure so that it is available is liquid from at about 280° C.
 heavy water is used as both coolant and moderator.
 the coolant water boils in the reactor core.
  both B and C.

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