A resistor is tested by applying several currents and recording the corresponding…

PHYSICS · Single correct · A Level · Physics · Electricity · Electricity

Problem

A resistor is tested by applying several currents and recording the corresponding potential differences. The plotted graph of

\Delta V

(vertical axis) versus

I

(horizontal axis) is a straight line described by the equation

\Delta V = 4.5\,(\text{V/A})\,I

. What is the resistance of the resistor? (a)

0.22\,\Omega

(b)

9.0\,\Omega

(c)

4.5\,\Omega

(d)

2.3\,\Omega