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

Sagot :

AL2006idn

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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