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Questions  

The magnetic field in a region is given by B=B0i^.  A charged particle of specific charge α is given a velocity  v=v02  i^+3v02j^ at the origin. Find the minimum distance of the point on the x-axis from the origin where the particle will cut the x-axis.

a
3 πv02αB0
b
πv02αB0
c
πv0αB0
d
3 πv0αB0

detailed solution

Correct option is C

ω=QB0m=αB0       ∴   T=2πω = 2παB0∴ Minimum distance =T×  V02 =πV0αB0

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