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Ohm's Law

Ohm's Law is a fundamental principle in electrical engineering that describes the relationship between voltage, current, and resistance in an electrical circuit. It is essential for understanding how electrical circuits function.

Ohm's Law Formula

The basic formula of Ohm's Law is:

V= I × R

where:

• $V$is the voltage (measured in volts, V)
• $I$ is the current (measured in amperes, A)
• $R$ is the resistance (measured in ohms, Ω)

Key Concepts

1. Voltage (V): Voltage is the electrical potential difference between two points in a circuit. It is the driving force that pushes electric charge through the circuit.

2. Current (I): Current is the flow of electric charge in a circuit. It is the rate at which charge passes through a point in the circuit.

3. Resistance (R): Resistance is a measure of how much a component or material opposes the flow of electric current. Higher resistance means less current for a given voltage.

Applications of Ohm's Law

1. Calculating Voltage: If you know the current and resistance, you can calculate the voltage: V=I×R

2. Calculating Current: If you know the voltage and resistance, you can calculate the current: I=V/R​​

3. Calculating Resistance: If you know the voltage and current, you can calculate the resistance: R=V/I​​