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A radioactive sample at any instant has ...

A radioactive sample at any instant has its disintegration rate `5000` disintegrations per minute. After `5` minutes , the rate is `1250` disintegration per minute. Then , the decay constant (per minute)

A

0.4 In 2

B

0.2 In 2

C

0.1 In 2

D

0.8 In 2

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The correct Answer is:
A
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Knowledge Check

  • A radioactive sample at any instant has its disintegration ratye 5000 disintegrations per minute After 5 minutes , the rate is 1250 disintegration per Then , the decay constant (per minute)

    A
    `0.4 in 2`
    B
    `0.2 in 2`
    C
    `0.1 in 2`
    D
    `0.8 in 2`

  • A radioactive element has rate of disintegration 10,000 disintegrations per minute at a particular instant. After four minutes it becomes 2500 disintegrations per minute. The decay constant per minute is

    A
    `0.2 log_(e) 2`
    B
    `0.5 log_(e) 2`
    C
    `0.6 log_(e) 2`
    D
    `0.8 log_(e) 2`

  • Find the decay constant (per minute) of a radioactive sample if at any instant its disintegration rate is 5000 disintegrations per minute and after 5 minutes, the rate is 1250 disintegrations per minute.

    A
    `0.4 ln 2`
    B
    `0.2 ln 2`
    C
    `0.1 ln 2`
    D
    `0.8 ln 2`

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