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Sahay Sir > Question Answers > MTG NEET Physics > Part 2 > Chapter 13 - Nuclei > At radioactive substance decay at the rate of 5000 disintegration per minute. After 5 minute the decay rate is 1250 disintegration per minute. The decay constant is

At radioactive substance decay at the rate of 5000 disintegration per minute. After 5 minute the decay rate is 1250 disintegration per minute. The decay constant is

At radioactive substance decay at the rate of 5000 disintegration per minute. After 5 minute the decay rate is 1250 disintegration per minute. The decay constant is