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6 October, 06:18

A 75 W lightbulb is being run on a 110 V outlet. Determine the resistance of the lightbulb. Provide a detailed description of the process.

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  1. 6 October, 06:44
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    Power is defined as

    P = I*V

    where I is the current and V is the voltage

    Ohm's law gives us the relation betwen Voltage and current in a resistive component

    V = I*R, Then

    P = V² / R

    We solve for R,

    R = (110 V) ² / 75W = 161.33 ohms
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