A particle having mass m, charge q enters a cylinder region having uniform magnetic field B in the inward direction as shown. If the particle is deviated by 60° as it emerges out of the field then the time spent by it in the field is $\frac{π m}{NqB}$ . The value of N is :-

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Ans (3.00) From the geometry, the particle turns through 3 π ​ inside the field region: 3 π ​ = ω t t = 3 qB πm ​

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