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Physics transformers question?

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the plug in transformer for a laptop computer puts out 7.50 V and can supply a maximum current of 2.00 A. What is the maximum input current if the input voltage is 120 V?

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  1. I1V1 = I2V2

    I1 = I2V2 / V1

    = (7.50 V x 2.00 A) / 120 V

    = 0.125 A

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