Exercise 1

Which of the following processes does not represent a gamma decay?

An unstable nucleus emits radiations to transform into less unstable state. Select the correct statement(s).

The decay constant of a radioactive substance is $\lambda$. At $t=0$, the number of active nuclei are $N_0$. Select the correct alternative

Radioactive nuclei are being generated at a constant rate by some kind of nuclear reaction. If the decay constant for the radioactive nuclei is $\mathrm{\lambda }$, which of the following graphical representation is correct? (initially, there are no radioactive nuclei present)

The count rate of a radioactive sample was $1600 \mathrm{count} {\mathrm{s}}^{–1}$ at $t=0$ and $100 \mathrm{count} {\mathrm{s}}^{–1}$ at $t=8 \mathrm{s}.$ Select the correct alternatives

If potential energy of a proton and an electron system is given by $U=\frac{-K{e}^2}{2R^3},$ where $e$ is the charge of the electron and $R$ is the radius of orbit. Then

Which one of the following is correct statement in the context of $X$-rays generated from $X$-ray tube?

Choose the correct statement(s).