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A single-phase transformer rated for 220/240 V, 50Hz operates at no load at 220 V, 40 Hz. This frequency operabon at rated voltage results in which one of the following? | |
A. | Increase of both eddy-current and hysteresis losses. [Wrong Answer] |
B. | Reduction of both eddy-current and hysteresis losses. [Wrong Answer] |
C. | Reduction of hysteresis loss and increase in eddy-current loss. [Wrong Answer] |
D. | Increase of hysteresis loss and no change in the eddy-current loss. [Correct Answer] |