Q 11-01-108JEE MainJEE Main 2024 (29 Jan, Shift 1)Easy
The resistance $R = \dfrac{V}{I}$, where $V = (200 \pm 5)\ \text{V}$ and $I = (20 \pm 0.2)\ \text{A}$. The percentage error in the measurement of $R$ is:
Answer: (A) $3.5\%$
$$\frac{\Delta R}{R}\times100 = \frac{\Delta V}{V}\times100 + \frac{\Delta I}{I}\times100 = \frac{5}{200}\times100 + \frac{0.2}{20}\times100 = 2.5\% + 1\% = 3.5\%$$
Solution by Sreeraj P, M.Sc Physics