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A uniform magnetic field exists in a cir...

A uniform magnetic field exists in a circular region of radius `r`.The magnitude of magnetic field is `B` and points inward.An electron flies into the region radially as shown in figure.After a certain time, the electron deflected by the magnetic field leaves the region.The time interval during which the electron moves in the region is `(Nm tan^(-1(eBr)/(mV)))/(eB)`.Then find value of `N`.(`m` is mass of electron and `e` is charge of electron)

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The correct Answer is:
`2`
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RESONANCE-ELECTRODYNAMICS-Exercise-2 PART-2
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