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26 September, 19:23

A coffee-maker contains a heating element that has a resistance of 28 Ï. this heating element is energized by a 120-v outlet. what is the current in the heating element?

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  1. 26 September, 21:34
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    I (current) = v (voltage) / r (resistance)

    I = 120v / 28ï = 4.285 amperes = 4.29 amps

    FYI: Ohm's Law shows the relationship between voltage, current, and resistance. This equation, i = v/r, tells us that the current, i (in amps) flowing through a circuit is inversely proportional to the resistance, r (in ohms), but current is directly proportional to the voltage, v (in volts).
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