Question

The resistance $R = \frac{V}{I}$ where $V = (100 \pm 5) V$ and $I = (10 \pm 0.2) A.$ The percentage error in R is

• A. 0.052
• B. 0.048
• C. 0.07
• D. 0.03

Answer 1

Answer: (C)

0.07

Answer 2

$R =\frac{ v }{ I }$
$\frac{\Delta R }{ R } \times 100=\frac{\Delta V }{ V } \times 100+\frac{\Delta I }{ I } \times 100$
$=5 \%+2 \%=7 \%$