Question

v-1 graph for ohms law​

Answer 1

Three quantities which are fundamental to electric circuits are current, voltage (potential difference) and resistance. To recap:

Electrical current, \(I\), is defined as the rate of flow of charge through a circuit.

Potential difference or voltage, \(V\), is the amount of energy per unit charge needed to move that charge between two points in a circuit.

Resistance, \(R\), is a measure of how `hard' it is to push current through a circuit element.

We will now look at how these three quantities are related to each other in electric circuits.

An important relationship between the current, voltage and resistance in a circuit was discovered by Georg Simon Ohm and it is called Ohm's Law.

Ohm's Law tells us that if a conductor is at a constant temperature, the current flowing through the conductor is directly proportional to the voltage across it. This means that if we plot voltage on the x-axis of a graph and current on the y-axis of the graph, we will get a straight-line.