An electric heater’s resistance is calculated using

PHYSICS · Single correct · CBSE · Physics · Units and Measurements · Units and Measurements

Problem

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\%

(b)

1.7\%

(c)

3.7\%

(d)

5.8\%