SSC JE Electrical Engineering 2012 Paper

Question : 177 of 200

Marks: +1, -0

The iron loss in a 100 KVA transformer is 1 KW and full load copper losses are 2 KW. The maximum efficiency occurs at a load of

Solution:

(S_n)_\max=S×√{P_i/{P_{\CU(\full\load)}}}

=100\KVA√{1/2}

=100/√2\KVA

= 70.7 KVA

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