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MHT CET Physics question

PhysicsNucleiMHT CET

Half-life of radioactive sample, when activity of material initially was 8 counts and after 3 hours it becomes 1 count is

Answer: (B)

Solution

is , i.e. 3 half-lives in 3 h, so h; 2, 3 and 4

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Question ID VK-084788