Question #186824

The wall charger for an iPhone is 900mA. If you have it plugged into the wall for 2 hours, how much power have you consumed? 


1
Expert's answer
2021-04-30T11:29:23-0400

The power is current times voltage, the energy is power times time this power was used. So, the power is (the charges has a voltage rating of 5V):


P=IV=0.9⋅5=4.5 W.P=IV=0.9·5=4.5\text{ W}.



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