NEET UG PHYSICS MCQ: NUCLEI

1 Medium

1 of 1

Application +4 | -1

A freshly prepared radioactive sample having half life 4 hours, emits radiation of intensity which is 64 times the permissible level. The minimum time in hours after which it is safe to work with the source will be

View answer and explanation

Correct option: B

24 hours

Option B (24 hours) is correct because it represents the time required for the radiation intensity to reduce to the permissible level, calculated using the concept of half-life.

More Questions from NUCLEI

Practice All Chapter MCQs →

The ratio of the nuclear radii of elements with mass numbers

\mathrm{216}

\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