Mean life of a radioactive sample is 100 seconds. Then its half life (in minutes) is

English

Gujarati

Hindi

13.Nuclei

medium

Mean life of a radioactive sample is $100$ seconds. Then its half life (in minutes) is

A

$0.693$

B

$1$

C

$10^{-4}$

D

$1.155$

Solution

(d) Mean life $(T) = 1/\lambda = 100\, second$

Half-life =$\frac{{0.693}}{\lambda } = \frac{{0.693 \times 100}}{{60}}=1.155\, min.$

Standard 12

Physics

Share

Similar Questions

For a radioactive material, half-life is $10$ minutes. If initially there are $600$ number of nuclei, the time taken (in minutes) for the disintegration of $450$ nuclei is

medium

(NEET-2018)

The activity of a radioactive sample

easy

The half life of radioactive Radon is $3.8$ days. The time at the end of which $1/{20^{th}}$ of the Radon sample will remain undecayed is ……….. $day$ (Given ${\log _{10}}e = 0.4343$)

hard

(IIT-1981)

The half-life of a radioactive substance is $40$ years. How long will it take to reduce to one fourth of its original amount and what is the value of decay constant

medium

A count rate meter shows a count of $240$ per minute from a given radioactive source. One hour later the meter shows a count rate of $30$ per minute. The half-life of the source is ……….$min$

medium