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JEE Main 2018 Physics question

PhysicsNucleiJEE Main 2018

At some instant, a radioactive sample having an activity 5 µCi has twice the number of nuclei as another sample which has an activity of 10 µCi. The half lives of and are -

Answer: (D)

Solution

, $λ_2 N = 10 ⇒ λ_2 =

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Question ID VK-009122