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Two thin, long, parallel wires, separated by a distance ‘$d$’ carry a current of ‘$i$’ in the same direction. They will
  • AAttract each other with a force of ${\mu _0}{i^2}/(2\pi {d^2})$
  • BRepel each other with a force of ${\mu _0}{i^2}/(2\pi {d^2})$
  • CAttract each other with a force of ${\mu _0}{i^2}/(2\pi d)$
  • DRepel each other with a force of ${\mu _0}{i^2}/(2\pi d)$
AIEEE 2005, Medium
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