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Given the "category", I presume you are using standard electric devices having standard wiring with standard thickness (i.e., resistance or ohms), so the answer would be approximately 48 watts, which is more than enough to charge typical cell phones, but not nearly enough for typical hair dryers. Use the following website for similar questions, by entering the voltage and amperage, then clicking the "Calculate" button: http://ourworld.compuserve.com/homepages/Bill_Bowden/ohmslaw.htm

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15y ago
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Q: How many watts are in 240 volts with 0.2 amps?
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