NEET UG PHYSICS MCQ: NUCLEI

1 Hard

1 of 1

Application +4 | -1

A radioactive sample decays by

\beta

-emission. In first two seconds '

n

\beta

-particles are emitted and in next 2 seconds, '

0.25n

\beta

-particles are emitted. The half-life of radioactive nuclei is:

View answer and explanation

Correct option: C

1 \mathrm{~sec}

Option C (

1 \mathrm{~sec}

) is correct because the number of beta particles emitted is proportional to the number of radioactive nuclei remaining, and the ratio of emissions in consecutive intervals gives the decay factor.

More Questions from NUCLEI

Practice All Chapter MCQs →

The ratio of the nuclear radii of elements with mass numbers

\mathrm{216}

and

\mathrm{125}

is In a hypothetical fission reaction

{ }_{92} X^{236} \rightarrow{ }_{56} Y^{141}+{ }_{36} Z^{92}+3 R

The identity of emitted particles

({R})

is: The radius of the nucleus of the atom with A=216 is (take

{R_0}\; = \mathrm{ }1.3fm

) The correct sequence of the increasing wavelength of the given radiation sources is Which of the following nuclear fragments corresponding to nuclear fission between neutron

\left({ }_0^1 \mathrm{n}\right)

and uranium isotope

\left({ }_{92}^{235} \mathrm{U}\right)

is correct: Which of the following has the mass closest in value to that of the positron

1\,\,a.m.u = 931\,\,MeV