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14 May, 07:29

Calculate the power provided by a 3.2 volt LED given it has a current of 0.020 amperes and a resistance of 160 ohms.?

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  1. 14 May, 07:55
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    Power = (current squared) x (resistance)

    OR

    Power = (volts) x (amps)

    Doesn't matter which way you do it. This LED dissipates 0.064 watt. Some of that comes out as light, the rest as heat.
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