The figure shows a region of length ' l with a uniform magnetic field of 0.3 {T} in it and a proton entering the region with velocity 4 \\times10^{5} {ms}^{-1} making an angle 60^\circ with the field. If the proton completes 10 revolution by thetime it cross the region shown, ' l' is close to (mass of proton =1.67 \\times 10^{-27} {kg}, charge of the proton =1.6 \\times 10^{-19} {C} ) [2 Sep 2020 Shift 2]

JEE Mains 02-Sep-2020 Shift 2 Solved Paper

Section: Physics

Question : 1 of 75

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The figure shows a region of length ' l with a uniform magnetic field of 0.3T in it and a proton entering the region with velocity 4×105 ms−1 making an angle 60° with the field. If the proton completes 10 revolution by thetime it cross the region shown, ' l′ is close to (mass of proton =1.67×10−27 kg, charge of the proton =1.6×10−19 C )

[2 Sep 2020 Shift 2]

0.11 m
0.22 m
0.44 m
0.88 m

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