Class 10 Physics Electricity | OHMs Law |

__OHM’s Law__

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__

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