Physics · 2024
JEE Main · 4 April 2024, Shift 1 · Q49
In an experiment to measure focal length (f) of convex lens, the least counts of the measuring scales for the position of object ( u ) and for the…
In an experiment to measure focal length (f) of convex lens, the least counts of the measuring scales for the position of object ( $\displaystyle \mathbf{u}$ ) and for the position of image ( $\displaystyle \mathbf{v}$ ) are $\displaystyle \Delta \mathbf{u}$ and $\displaystyle \Delta \mathbf{v}$, respectively. The error in the measurement of the focal length of the convex lens will be:
Official answer
From NTA’s final answer key for this paper.
(4)
$\displaystyle f^2\left[\frac{\Delta u}{u^2}+\frac{\Delta v}{v^2}\right]$
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JEE Main 2024 Physics question, with the answer from NTA’s final answer key. Where our answers come from.