Physics · 2025
JEE Main · 7 April 2025, Shift 2 · Q44
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…
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 $\displaystyle \left({ }_{29}^{64} \mathrm{Cu}\right)$ nucleus is greater than that of the carbon $\displaystyle \left({ }_6^{12} \mathrm{C}\right)$ nucleus.Reason (R) : The nucleus of mass number A has a radius proportional to $\displaystyle \mathrm{A}^{1 / 3}$.
In the light of the above statements, choose the most appropriate answer from the options given below :
Official answer
From NTA’s final answer key for this paper.
(4)
(A) is not correct but (R) is correct
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JEE Main 2025 Physics question, with the answer from NTA’s final answer key. Where our answers come from.