Moderate

In an actual transformer the iron loss remains practically constant from no load to full load because:____________?

Correct answer: C. core flux remains practically constant

A. value of transformation ratio remains constant
B. permeability of transformer core remains constant
C. core flux remains practically constant
D. primary voltage remains constant
E. secondary voltage remains constant

Explanation

With rated voltage and frequency held constant, the core flux is approximately constant from no load to full load. Since hysteresis and eddy-current losses mainly depend on flux and frequency, the iron loss remains nearly unchanged.

Last updated 16 September 2026

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In an actual transformer the iron loss remains practically constant from no load to full load because:____________?

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