The resistance of a wire is calculated from

PHYSICS · Subjective · A Level · Physics · Measurements and their errors · Measurements and their errors

Problem

R = \dfrac{\rho L}{A}

, where the resistivity is

\rho = (1.68 \pm 0.05)\times 10^{-8}\,\Omega\,\text{m}

, the length is

L = (2.00 \pm 0.02)\,\text{m}

and the cross-sectional area is

A = (1.2 \pm 0.1)\times 10^{-6}\,\text{m}^{2}

. Determine the value of

R

and its percentage uncertainty. Quote the resistance with an appropriate number of significant figures.