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The current (I) in an electrical conductor varies inversely as the resistance (r) of the conductor. The current is 2 amperes when the resistance is 960 ohms. What is the current when the resistance is 480 ohms?

User Nicholas C
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2 Answers

6 votes
the current is 4 amperes
User Jim Keener
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5 votes

I=(k)/(r), where
k is constant of variation.

(2)/(1) = (k)/(960) \\k=2\cdot960=1920.

Since we know the data to find the current when the resistance is 480 Ohms
\Rightarrow
I=(k)/(r)=(1920)/(480)=4 \ amperes.
User Sanjeevjha
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