How do i calculate power consumption for an adapter?

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Science & Mathematics by Anonymous 2018-09-15 14:23:34

Social Science

How do i calculate power consumption for an adapter?

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For example i have an adaptor Input 100v-230v @0.5A Output 5v @2A Cost $1 / kWh lets say it runs on full load for an hour with input measure @100v 0.5A (20W) Where output @5v 2A (10W) input consume 20W ouput produce 10W which one do i use to calculate the cost per hour?