Physics

Problem

An electric heater’s resistance is calculated using

R = \dfrac{V^{2}}{P}

. The potential difference and power are measured as

V = 12.0\,\text{V} \pm 0.1\,\text{V}

and

P = 24.0\,\text{W} \pm 0.5\,\text{W}

. Find the percentage uncertainty in

R

. a)

2.9\%

1.7\%

3.7\%

5.8\%