JEE Main 2025 — Nuclear Physics Question with Solution
JEE Main 2025 (7 Apr Shift 2)
Question
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : The density of the copper nucleus is greater than that of the carbon nucleus.
Reason (R): The nucleus of mass number A has a radius proportional to .
In the light of the above statements, choose the most appropriate answer from the options given below :
Assertion (A) : The density of the copper nucleus is greater than that of the carbon nucleus.
Reason (R): The nucleus of mass number A has a radius proportional to .
In the light of the above statements, choose the most appropriate answer from the options given below :
Choose an option
Show full solutionCorrect option: B
Correct answer
B is not correct but is correct
Step-by-step explanation
So is almost is constant
$\begin{aligned}
& \mathrm{R}=\mathrm{R}_0 \mathrm{~A}^{1 / 3} \\ & \mathrm{R} \propto \mathrm{~A}^{1 / 3}
\end{aligned}$
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This is a previous-year question from JEE Main 2025, covering the Nuclear Physics chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.