(7)/(8)th of nuclei have been disintegra...

`(7)/(8)th` of nuclei have been disintegrated in 2 minutes after fresh sample was prepared. The half life of the sample is

30 seconds

1 minute

40 seconds

20 seconds

Text Solution

Verified by Experts

The correct Answer is:

2 minutes=3half life
1 half life `=(120)/(3)` =40sec

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7/8th of the active nuclei present in a radioactive sample has decayed in 8 s. The half-life of the sample is

(a) 2s

(b) 1s

(d) 8/3 s

For a radioactive sample, 15/16 th part decays in 20 minutes. The half-life of the sample is

4 minutes

5 minutes

6 minutes

7 minutes

In a sample of radioactive material , what fraction of the initial number of active nuclei will remain undisintegrated after half of the half life of the sample ?

`1/4`

`1/(2sqrt2)`

`1/sqrt2`

`sqrt2-1`

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`(7)/(8)th` of nuclei have been disintegrated in 2 minutes after fresh sample was prepared. The half life of the sample is

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7/8th of the active nuclei present in a radioactive sample has decayed in 8 s. The half-life of the sample is

For a radioactive sample, 15/16 th part decays in 20 minutes. The half-life of the sample is

In a sample of radioactive material , what fraction of the initial number of active nuclei will remain undisintegrated after half of the half life of the sample ?

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