In a radioactive decay process , the negatively charged emitted $\beta -$ particles are
the electrons orbiting around the nucleus
the electrons produced as a result of collisions between atoms
the electrons produced as a result of the decay of neautrons inside the nucleus
the electrons present inside the nucleus
The activity of a radioactive sample is measured as $N_0$ counts per minute at $t = 0$ and $N_0/e$ counts per minute at $t = 5\, minutes$. The time (in $minutes$) at which the activity reduces to half its value is
Which of the following cannot be emitted by radioactive substances during their decay
Write and derive the law of radioactivity decay.
A nucleus has a half-life of $30\; min$. At $3 \;PM$ its decay rate was measured as $120000 \,cps$. the decay rate ........... $\,cps$ at $5 \,PM$ ?
The activity of a sample reduces from $A_0$ to ${A_0} / \sqrt{3}$ in one hour. The activity after $3$ hours more will be