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Two radioactive materials X(1) and X(2) ...

Two radioactive materials `X_(1)` and `X_(2)` have decay constants `5 lambda` and `lambda` respectively. If initially they have the same number of nuclei, then the ratio of the number of muclei of `X_(1)` to that of `X_(2)` will be `1/e` after a time

A

`1/(2lambda)`

B

`1/(4lambda)`

C

`1/(6lambda)`

D

`1/(8lambda)`

Text Solution

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The correct Answer is:
B
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Two radioactive materials X_(1) and X_(2) have decay constans 10lambda and lambda respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of X_(1) to that of X_(2) will be 1/e after time

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Knowledge Check

  • Two radioactive materials X_1 and X_2 have decay constants 10 lambda and lambda respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of X_1 to that of X_2 will be 1/e after a time

    A
    `1/(10lambda)`
    B
    `1/(11lambda)`
    C
    `11/(10lambda)`
    D
    `1/(9lambda)`

  • Two radioactive materials X_1 and X_2 have decay constants 10 lamda and lamda respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of X_1 to that of X_2 will be 1//e after a time.

    A
    `lamda`
    B
    `(1)/(2) lamda`
    C
    `(1)/(4 lamda)`
    D
    `( e)/(lamda)`

  • Two radioactive X_(1) and X_(2) have docay constants 10 lambda and lambda respecttively . If inittially they have the same number of noclei, then the radio of the number of nuclei of X_(1) to that of X_(2) will be 1//e after a time .

    A
    `(1)/(10 lambda)`
    B
    `(1)/(11 lambda)`
    C
    `(11)/(10 lambda)`
    D
    `(1)/(9 lambda)`

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