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A long, straight wire carries a current i. A particle having a positive charge `q` and mass `m` kept at a distance `x_(0)` from the wire is projected towards it with a speed `v` as shown in figure.Find the minimum separation between the wire and the particle.

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`ln ""(x)/(x_0)= (-v)/(k) or x = x_(0e) (-v)/(k) = x_(0)e^((-2pimv)/(mu_0qi))`
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AAKASH SERIES-ELECTROMAGNETICS-PROBLEMS (LEVEL -II)
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