OHM’s law states that under no same temperature, electric current flowing through an ideal conductor is directly proportional to the potential difference across its ends.
V ∝ I
V = IR, R – Resistance
- Resistance is a property of conductor to resist flow of charge through it. Its SI unit is Ohm (Ω).
R = V/I, 1 Ohm = 1 Volt/ 1 Ampere
- I = V/R denotes that Current is inversely proportional to Resistance. Hence, greater the resistance lesser will be the flow of current and vice-versa.
- A rheostat or a variable resistor is a device or a component which allows changing of resistance in a circuit keeping the voltage same.
- In a conductor, electrons are attracted by the atoms. This is a resistive force which is lower for a good conductor but very high for an insulator. A conductor having some resistance is called a Resistor.
Ohm’s Law experiment