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JEE Main 2022 Physics question

PhysicsNucleiJEE Main 2022

A radioactive nucleus can decay by two different processes. Half-life for the first process is 3.0 hours while it is 4.5 hours for the second process. The effective half-life of the nucleus will be:

Answer: (4)

Solution

The two decay constants add: . So

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Question ID VK-025211