What is Ohm’s Law?
Ohm’s Law is a foundational principle in electrical work that states the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R). This is mathematically expressed as V = IR.
In residential and commercial electrical systems, Ohm’s Law is crucial for designing and troubleshooting circuits. Electricians use it to calculate the appropriate wire size, verify system safety, and diagnose voltage drops or overloads. For example, if an appliance is not functioning correctly, an electrician might apply Ohm’s Law to determine if excessive resistance or insufficient voltage is causing the issue.
Understanding and applying Ohm’s Law ensures that circuits operate safely and efficiently, reducing the risk of fire, equipment damage, or injury.
