PhysicsHard156×since 2002Q8317The radius (r)(\mathrm{r})(r), length (l)(l)(l) and resistance (R)(\mathrm{R})(R) of a metal wire was measured in the laboratory as r=(0.35±0.05) cmR=(100±10) ohml=(15±0.2) cm\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}r=(0.35±0.05) cmR=(100±10) ohml=(15±0.2) cm The percentage error in resistivity of the material of the wire is :A37.3%37.3 \%37.3%B25.6%25.6 \%25.6%C35.6%35.6 \%35.6%D39.9%39.9 \%39.9%Check answerSkip