Physics · 2024
JEE Main · 1 February 2024, Shift 1 · Q50
The radius (r), length (l) and resistance (R) of a metal wire was measured in the laboratory as r =(0.35 ± 0.05) cm; R =(100 ± 10) ohm; l=(15 ± 0.2)…
The radius (r), length (l) and resistance (R) of a metal wire was measured in the laboratory as
$$\begin{aligned}
& \mathrm{r}=(0.35 \pm 0.05) \mathrm{cm} \\
& \mathrm{R}=(100 \pm 10) \mathrm{ohm} \\
& l=(15 \pm 0.2) \mathrm{cm}
\end{aligned}
$$
The percentage error in resistivity of the material of the wire is:
Official answer
From NTA’s final answer key for this paper.
(1)
39.$\displaystyle 9$%
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JEE Main 2024 Physics question, with the answer from NTA’s final answer key. Where our answers come from.