The half-life of a radioactive substance is $20\, min$. The approximate time interval $\left(t_{2}-t_{1}\right)$ between the time $t_{2},$ when $\frac{2}{3}$ of it has decayed and time $t_{1},$ when $\frac{1}{3}$ of it had decayed is (in $min$)
The half-life of a radioactive substance is $20\, min$. The approximate time interval $\left(t_{2}-t_{1}\right)$ between the time $t_{2},$ when $\frac{2}{3}$ of it has decayed and time $t_{1},$ when $\frac{1}{3}$ of it had decayed is (in $min$)
- [AIIMS 2018]
- A
$14$
- B
$20$
- C
$28$
- D
$7$
Similar Questions
Three fourth of the active decays in a radioactive sample in $3/4\, sec$. The half life of the sample is
Three fourth of the active decays in a radioactive sample in $3/4\, sec$. The half life of the sample is
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
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
- [NEET 2018]
The decay constant of a radioactive element is $0.01$ per second. Its half life period is .......$sec$
The decay constant of a radioactive element is $0.01$ per second. Its half life period is .......$sec$
The disintegration rate of a certain radioactive sample at any instant is $4250$ disintegrations per minute.$10$ minutes later, the rate becomes $2250$ disintegrations per minute. The approximate decay cons $.........\min^{-1}$
The disintegration rate of a certain radioactive sample at any instant is $4250$ disintegrations per minute.$10$ minutes later, the rate becomes $2250$ disintegrations per minute. The approximate decay cons $.........\min^{-1}$
- [JEE MAIN 2022]
$99\%$ of a radioactive element will decay between
$99\%$ of a radioactive element will decay between