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【Daily Question】Electrical Technology 2019-1-24

2019-01-24View Original

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A single-phase transformer with a capacity of 20 kVA and a voltage ratio of U1/U2 = 3300/220 V can, under normal operating conditions, power 220V, 40W incandescent lamps. A. 500    B. 800    C. 90    D. 200A

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