UP Board Class 12 Nuclei — practice questions
16 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice UP Board Class 12 Nuclei in the app →The radius of a nucleus with mass number $A = 64$ is approximately ($R_0 = 1.2$ fm):The mass defect $\Delta m = 0.5$ u of a nucleus corresponds to a binding energy of approximately:Among alpha, beta and gamma radiation, the most penetrating is:A radioactive sample's activity drops to $1/8$ of the initial value over $30$ years. Its half-life is:The unified atomic mass unit (u) is defined as exactly $1/12$ of the mass of an atom of which isotope?The strong nuclear force has which of the following PROPERTIES?Experiments show that the nuclear radius scales as $R = R_0\,A^{1/3}$ with $R_0 \approx 1.2\,\text{fm}$. A dirThe mass defect $\Delta m$ of a nucleus $\,^{A}_{Z}\mathrm{X}$ with mass $M$ is defined asThe energy equivalent of one unified atomic mass unit (1 u) is closest toLooking at the binding energy per nucleon vs mass number ($A$) curve, the binding energy per nucleon is MAXIMUWhen a nucleus $\,^{A}_{Z}\mathrm{X}$ undergoes ALPHA decay, the daughter nucleus hasIn BETA-MINUS ($\beta^-$) decay, the parent nucleus emits an electron AND another particle. The other particleA radioactive sample has half-life $T_{1/2} = 5$ years. Starting with $N_0$ undecayed nuclei, the number remaiThe total binding energy of $\,^{16}_{8}\mathrm{O}$ is approximately $127.6\,\text{MeV}$. Its binding energy pWhy is iron the threshold beyond which heavy-nucleus FISSION releases energy, but nuclei lighter than iron relThe activity of a radioactive sample drops from $4000\,\text{decays/s}$ to $500\,\text{decays/s}$ in $30$ minu