Homework Help: Algebra

Posted by Julie on Saturday, February 19, 2011 at 5:16pm.

The resistance in an electric circuit varies inversely with the current. If the resistance is 12 ohms when the current is 4 amps, what is the resistance when the current is 8 amps.?

Algebra - Reiny, Saturday, February 19, 2011 at 6:40pm
R = kI, where k is a constant.
put in the given values
12 = k(4)
k = 3

Now you have your equation to answer the last part

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