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In a region, magnetic field along axis changes according to the graph given in figure.

If time period, pitch and radius of helix path are and respectively, and if the particle is projected at an angle with the positive axis toward positive y-axis in plane, then
Select the correct statement:
Important Questions on Magnetic Effect of Current
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A proton (mass ) accelerated by a potential difference flies through a uniform transverse magnetic field . The field occupies a region of space by width . If be the angle of deviation of proton from the initial direction of motion (see figure), the value of will be:

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The figure shows a region of length '' with a uniform magnetic field of in it and a proton entering the region with velocity making an angle with the field. If the proton completes revolution by the time it cross the region shown, '' is close to (mass of proton , charge of the proton)

