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MHT CET 2025 Physics question

PhysicsNucleiMHT CET 2025

A radio active element has rate of disintegration 8000 disintegrations per minute at a particular instant. After four minutes it becomes 2000 disintegrations per minute. The decay constant per minute is

Answer: (C)

Solution

Activity . Here , so two half-lives elapse in 4 min and min. Hence per

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Question ID VK-102948