JEE Main 2026 Physics question
Two radioactive substances A and B of mass numbers 200 and 212 respectively, shows spontaneous α-decay with same Q value of 1 MeV. The ratio of energies of α-rays produced by A and B is .
Answer: (C)
Solution
By momentum conservation the α-particle carries kinetic energy K_α=Q(M−4)/M for a parent
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