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31 May, 16:01

What is the resistance of a 1200 W electric frying pan that draws a current of 11a?

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  1. 31 May, 18:47
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    One of the handy formulas for the power dissipated by

    a circuit element is

    Power = (current) ² x (resistance).

    That certainly seems to be the one to use for this problem,

    since we're given the power and the current, and we're asked

    to find the resistance.

    Power = (current) ² x (resistance).

    Divide each side by (current) ²:

    Resistance = (power) / (current) ²

    Resistance = (1200W) / (11 A) ²

    Resistance = 1200 / 121 = 9.917 ... ohms (rounded)
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