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JEE Advanced 2021 Paper 1

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Question : 17

Total: 57

An α-particle (mass 4 amu) and a singly charged sulfur ion (mass 32amu ) are initially at rest. They are accelerated through a potential V and then allowed to pass into a region of uniform magnetic field which is normal to the velocities of the particles. Within this region, the α-particle and the sulfur ion move in circular orbits of radii rα and rs, respectively. The ratio (rs/rα) is

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