A particle of mass m and charge + q is p...

A particle of mass m and charge + q is projected from origin with velocity `vec(V)=V_(0)hati` in a magnetic field `vec(B)=-(B_(0)x)hatk.` Here `V_(0)` and `B_(0)` are positive constants of proper dimensions. Find the radius of curvature of the path of the particle when it reaches maximum positive x co-ordinate.

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The correct Answer is:

[`sqrt((2mv_(0))/(B_(0)q))`]

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