Answer Posted / princealekota

Since transformer is a static there will not be any
rotational losses it have only iron loss depend upon
voltage and copper loss depend upon current

for AC supply systems like generator, transformer rating is
done in KVA because of inductance present in AC . we don't
know load is resitive or inductive

so we will take load KW=KVA,

power = voltage*current*cos(pi)
if load isinductive cos(pi) have some value less than 1
if load is resistive cos(pi)is 1

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sir plz send some previous year questions of jspl.

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when ac current flows thru d coil of a contactr,it energizes,magnetic field attracts d contact of the coil...nw wont dt ac current in d contct induce current back on to d coil thru mutual inductance leading to high currnt in d coil

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rajha power sector details

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