Physics · 2026
JEE Main · 28 January 2026, Shift 2 · Q44
A nucleus has mass number α and radius R_α. Another nucleus has mass number β and radius R_β. If β=8 α then R_α / R_β is:
A nucleus has mass number $\displaystyle \alpha$ and radius $\displaystyle R_\alpha$. Another nucleus has mass number $\displaystyle \beta$ and radius $\displaystyle R_\beta$. If $\displaystyle \beta=8 \alpha$ then $\displaystyle R_\alpha / R_\beta$ is :
Official answer
From NTA’s final answer key for this paper.
(3)
$\displaystyle 0.5$
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JEE Main 2026 Physics question, with the answer from NTA’s final answer key. Where our answers come from.