Question

The percentage error in the measurement of voltage is 3% and in the measurement of vurrent is 2%.The percentage error in the measurement of resistance is?

Answer 1

By Ohm's Law, 
$R= \frac{V}{I}$
$\frac{\Delta R} {R} = \frac{\Delta V}{V} + \frac{\Delta I}{I} \\ \\ \frac{\Delta R} {R} =3\% + 2\% = 5 \%$