The decay constant $\lambda $ of the radioactive sample is the probability of decay of an atom in unit time, then
The decay constant $\lambda $ of the radioactive sample is the probability of decay of an atom in unit time, then
- A
$\lambda $ decreases as atoms become older
- B
$\lambda $ increases as the age of atoms increases
- C
$\lambda $ is independent of the age
- D
Behaviour of $\lambda $ with time depends on the nature of the activity
Similar Questions
Some nuclei of a radioactive material are undergoing radioactive decay. The time gap between the instances when a quarter of the nuclei have decayed and when half of the nuclei have decayed is given as:
(where $\lambda$ is the decay constant)
Some nuclei of a radioactive material are undergoing radioactive decay. The time gap between the instances when a quarter of the nuclei have decayed and when half of the nuclei have decayed is given as:
(where $\lambda$ is the decay constant)
- [JEE MAIN 2021]
If the mass of a radioactive sample is doubled, the activity of the sample and the disintegration constant of the sample are respectively
If the mass of a radioactive sample is doubled, the activity of the sample and the disintegration constant of the sample are respectively
A sample of radioactive material $A$, that has an activity of $10\, mCi\, (1\, Ci = 3.7 \times 10^{10}\, decays/s)$, has twice the number of nuclei as another sample of different radioactive material $B$ which has an activity of $20\, mCi$. The correct choices for half-lives of $A$ and $B$ would then be respectively
A sample of radioactive material $A$, that has an activity of $10\, mCi\, (1\, Ci = 3.7 \times 10^{10}\, decays/s)$, has twice the number of nuclei as another sample of different radioactive material $B$ which has an activity of $20\, mCi$. The correct choices for half-lives of $A$ and $B$ would then be respectively
- [JEE MAIN 2019]
The rate of disintegration of fixed quantity of a radioactive element can be increased by
The rate of disintegration of fixed quantity of a radioactive element can be increased by
Two radioactive samples $A$ and $B$ have half lives $T_1$ and $T_2\left(T_1 > T_2\right)$ respectively At $t=0$, the activity of $B$ was twice the activity of $A$. Their activity will become equal after a time
Two radioactive samples $A$ and $B$ have half lives $T_1$ and $T_2\left(T_1 > T_2\right)$ respectively At $t=0$, the activity of $B$ was twice the activity of $A$. Their activity will become equal after a time