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At a certain current, the energy stored in an iron-cored coil is 1,000 J and its copper loss is 2,000W. The time constant (in seconds) of the coil is | |
A. | 0.25 [Wrong Answer] |
B. | 0.5 [Wrong Answer] |
C. | 1.0 [Correct Answer] |
D. | 2.0 [Wrong Answer] |