A single-phase transformer rated for 220/240 V, 50 Hz operates at
no load at 220 V, 40 Hz. This frequency operation at rated voltage
results in which one of the following?
(a) Increase of both eddy-current and hysteresis losses.
(b) Reduction of both eddy-current and hysteresis losses.
(c) Reduction of hysteresis loss and increase in eddy-current
loss.
(d) Increase of hysteresis loss and no change in the eddy-
current loss.
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Answer:D
Explanation:
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