Question

when the iron loss and full load copper loss in a transformer are 900 w and 1600w respectively. the maximum efficiency occurs at ____ of full load ?
a. 25%
b. 50%
c. 75%
d. 100%​

Answer 1

Answer:

Maximum efficiency at = kVA X √( Wi / Wcu )

= kVA X √ ( 900 / 1600 ) = 75 % of full load.

Where Wi = iron loss, Wcu = copper loss.

Explanation: PIZ MARKE IT IN BRINLIST