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JEE Mains 02-Sep-2020 Shift 2 Solved Paper

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Question : 1

Total: 75

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 )

0.11 m
0.22 m
0.44 m
0.88 m

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