Physics · 2026
JEE Main · 21 January 2026, Shift 1 · Q45
In an experiment the values of two spring constants were measured as k_1=(10 ± 0.2) N / m and k_2=(20 ± 0.3) N / m. If these springs are connected in…
In an experiment the values of two spring constants were measured as $\displaystyle k_1=(10 \pm 0.2) \mathrm{N} / \mathrm{m}$ and $\displaystyle k_2=(20 \pm 0.3) \mathrm{N} / \mathrm{m}$. If these springs are connected in parallel, then the percentage error in equivalent spring constant is :
Official answer
From NTA’s final answer key for this paper.
(1)
1.$\displaystyle 67$%
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JEE Main 2026 Physics question, with the answer from NTA’s final answer key. Where our answers come from.