# Friction and Magnetism

A straight rod of mass $$1\text{ kg}$$ and length $$1\text{ m}$$ can slide on two parallel plastic rails kept in a horizontal plane with separation $$1\text{ cm}$$. The coefficient of friction between the wire and rails is $$\sqrt3$$.

If the wire carries a current $$10A$$, what minimum magnetic field would allow the wire to slide on the rails?

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