the current through an electric flat iron connected to a 220V line is 4A What is the power input of the flat?

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the current through an electric flat iron connected to a 220V line is 4A What is the power input of the flat?

What is the power input of the flat iron?

2007-10-04 03:41:13 · 3 answers · asked by pop cola2000 1 in Science & Mathematics ➔ Engineering

3 answers

watts = volts * amps.

220 * 4 = 880 watts

2007-10-04 03:43:54 · answer #1 · answered by J7 3 · 0⤊ 0⤋

For DC, the answer is easy: Watts = Volts * Amps

For AC, you need to be sure that you use RMS voltage and that you accoount for power factor. Since a flatiron is purely resistive, power factor is 1.0. As long as 220 V represents your RMS voltage, then you can go ahead and multiply:
220*4 = 880 watts

2007-10-04 04:09:38 · answer #2 · answered by dogsafire 7 · 0⤊ 0⤋

220V x 4A =880W

2007-10-04 03:47:52 · answer #3 · answered by poorguy 4 · 0⤊ 0⤋