Question

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?

Answer 1

the current is 4 amperes

Answer 2

`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`.