InterviewSolution
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InterviewSolution
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A Geigger Muller counter is used to study the radioactive process. In the absence of radioactive substances `A`, it counts `3` disintegration per second (dps). At the start in the presence of `A`, it records `23` dps, and after `10 m` in `13 dps`, i. What does it count after `20 m` in ?A. `8 dps, 10 mi n`B. `5 dps, 10 mi n`C. `5 dps, 20 mi n`D. `5 dps, 5 mi n` |
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Answer» Correct Answer - A In the absence of `A,3 dps` is zero error, hence Initial count`=23-3=20 dps` After `10 min= 13-3=10 dps` After `20 min= 5 dps` ( recorded `=5+3=8 dps)` (`50%` fall in `10 min, T_(50)=10min)` |
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