The peak value of an alternating current in a 1500-W device is 6.4 A. What is the rms voltage across it

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1. Answer:

   6787.5 V

   Explanation:

   From the question,

   P = IV………………… Equation 1

   Where P = Power, I = rms current, V = rms voltage.

   make V the subject of the equation

   V = P/I…………….. Equation 2

   Given: P = 1500 W, I = 6.4/√2 = 4.525 A

   Substitute these values into equation 2

   V = 1500(4.525)

   V = 6787.5 V

   Hence the rms voltage = 6787.5 V

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