After 300 days, the activity of a radioactive sample is 5000 dps (disintegrations per sec). The activity becomes 2500 dps after another 150 days. The

Question

After 300 days, the activity of a radioactive sample is 5000 dps (disintegrations per sec). The activity becomes 2500 dps after another 150 days. The

After 300 days, the activity of a radioactive sample is 5000 dps (disintegrations per sec). The activity becomes 2500 dps after another 150 days. The initial activity of the sample in dps is
A. 20000
B. 10000
C. 7000
D. 25000

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - A
As, activity droped from 5000 dps to 2500 dps in 150 days means `T_(1//2)=150"days"`
`implies300"days"=2T_(1//2)`
So, initial activity `2xx5000xx2=20000` dps

4 views Answered 2023-02-05 15:29