SSC JE Electrical Engineering 2013 Paper

Question : 168 of 200

Marks: +1, -0

If the frequency of input voltage of a transformer is increased keeping the magnitude of the voltage unchanged, then

Solution:

Eddy current loss

(P_e ) = k_e f^ 2B^2 t

B_m ∝V/f

P_e∝V^2

Hysterisis loss

= khB^1.6_m

So far increase in frequency keeping constant voltage hysterisis loss increase and Eddy current loss is constant.

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