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12 November, 14:12

If a 120 V appliance requires 15 A to operate, what is the resistance of the appliance?

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  1. 12 November, 17:56
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    The resistance is 16 ohm's

    V=I x R where V is the voltage, I is the current, and R is the resistance in Ohms

    120 = 15 x R

    R=120/15

    R = 8 Ohm's

    P=VxV / R

    P=120v x 120v / 8 ohms

    P = 14400/8

    P = 1800 watts

    R = V x V/P

    R = 14400/900

    R = 16 Ohm's

    The resistance is 16 ohm's:

    I = V/R

    I = 120/16

    I = 7.5 Amps
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