A particle of mass m and charge q is projected into a uniform magnetic – InterviewSolution

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1.	A particle of mass m and charge q is projected into a uniform magnetic field `underset(B)to=-B_(0)hatK` with velocity `underset(V)to-V_(0)hati` from origin. The position vector of the particle at time t is `underset(r)to`. Find the impulse of magnetic force on the particle by the time `underset(r)to.underset(V)to` becomes zero for the first time.
Answer» Correct Answer - `2 mv_(0)hati`

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