Question

find the resistance of that resistor
Class 10
Physics ​

Answer 1

Answer:

The resistance of the resistor is 2.7 Ω.

Explanation:

The graph is a V-I graph used as proof of Ohm's law. The law states that the potential difference developed across a conductor is directly proportional to the current passed through it. This can be mathematically represented as:

V = IR

Potential difference = current × resistance of the conductor

⇒ R = V/I

The resistance of the resistor can be found in the graph. Consider a single point on the graph plotted. Draw parallel lines to the X and Y-axis from that point and make them meet at the axes to get the values of current and the corresponding potential difference.

By proceeding as above, we'll get,

potential difference, V = 0.8 V

Current, I = 0.3 A

∴ Resistance of the resistor, R = 0.8/0.3 = 2.7 Ω