Embibe Experts Solutions for Chapter: Nuclear Physics, Exercise 1: AMU-AT (B.Tech.) 2017

A radioactive substance has an average life of $5$ hours. In a time of $5$ hours

The atomic number and the mass number of an atom remains unchanged when it emits

In a certain mass spectrometer, an ion beam passes through a velocity filter consisting of mutually perpendicular fields E and B. The beam then enters a region of another magnetic field $B^{\text{'}}$, perpendicular to the beam. The radius of curvature of the resulting ion beam is proportional to

Identify the correct statement(s) from among the following
(i) The constancy of the binding energy per nucleon in the range $30<A<170$ is a consequence of the fact that the nuclear force is short ranged.
(ii) The nuclear force does not depend on the charge of nucleons.
(iii) The nuclear force is repulsive when distance between two nucleons is less than $0.8\mathrm{fm}$

Density of nuclear matter is nearly

The mass-defect in a nuclear fusion reaction is $0.3$ per cent. The amount of energy released in one $\mathrm{kg}$ of fusion reaction is

A radioisotope has a half-life of $5\mathrm{yr}$. The fraction of atoms of this material, that would decay in $15\mathrm{yr}$ would be