Question

The values of current(I) flowing through a given resistor of resistance (R), for the corresponding values of potential difference (V) across the resistor are as given.

V(volts)	$0.5$	$1.0$	$1.5$	$2.0$	$2.5$	$3.0$	$4.0$	$5.0$
I(amperes)	$0.1$	$0.2$	$0.3$	$0.4$	$0.5$	$0.6$	$0.8$	$1.0$

Plot a graph between current(I) and potential difference (V) and determine the resistance (R) of the resistor.

Answer 1

From Ohm's Law, $V=IR$

$R=\frac{V}{I}$

which is nothing but the slope of $V-I$ curve,

hence $R=5\Omega$