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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > An electron and a proton enter region of uniform magnetic filed in a direction at right angles to the filed with the same kinetic energy. They describe circular paths of radius re and rp respectively. Then

An electron and a proton enter region of uniform magnetic filed in a direction at right angles to the filed with the same kinetic energy. They describe circular paths of radius re and rp respectively. Then

A proton of mass m and charge +e is moving in a circular orbit in a magnetic fielg with energy 1 Me V. What should be the energy of alpha particle ( mass = 4 m and charge = + 2e ) so that it can revolve in the path of same radius?