Two thin, long, parallel wires, separated by a distance ‘$d$’ carry a current of ‘$i$’ in the same direction. They will
AIEEE 2005, Medium
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$\left( {\frac{F}{l}} \right) = \frac{{{\mu _0}}}{{4\pi }}.\frac{{2{i_1}{i_2}}}{a}$ $==>$ $\left( {\frac{F}{l}} \right) = \frac{{{\mu _0}}}{{4\pi }}.\frac{{2{i^2}}}{d} = \frac{{{\mu _0}{i^2}}}{{2\pi d}}$ (Attractive)
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