A particle of mass m and charge q moving with velocity v enters region-b form region-a along the normal to the boundary as shown is the figure. Region-b has a uniform magnetic field B perpendicular to

Question

A particle of mass m and charge q moving with velocity v enters region-b form region-a along the normal to the boundary as shown is the figure. Region-b has a uniform magnetic field B perpendicular to the plane of the paper. Also, region-b has length L. Choose the correct statements :

TestHub · Accepted Answer

Particle enter region 'c' if Radius is greater than ' $L$ ' $\Rightarrow \frac{mV}{qB} > L \Rightarrow V > \frac{qB L}{m}$ $∵$ B is uniform and $V ⊥ B$ so. Path is circular in region b $Time spent = \frac{Angle cov ered}{ω} ω = \frac{qB}{m}$ Now angle covered depens on whether particle goes to region c or comes back to region 'a'

Physics - Magnetism Question with Solution | TestHub

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