Question

Please help me with 9th sum correct answer is 2

9) 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 the 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-1eBrmVeB. The find the value of N. (m is the mass of electron and e is the charge of electron)

Answer 1

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