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What is Ohm's Law, and how is it applied in electrical circuits?

1 Answer

Ohm's Law is a fundamental principle in electrical engineering and physics that describes the relationship between voltage, current, and resistance in an electrical circuit. It is named after Georg Simon Ohm, a German physicist who first formulated the law in the 1820s.

Ohm's Law is mathematically represented as:

V = I * R

Where:

V is the voltage across a component or the potential difference measured in volts (V).
I is the current flowing through the component measured in amperes (A).
R is the resistance of the component measured in ohms (Ω).

The law states that the current passing through a conductor between two points is directly proportional to the voltage across the conductor and inversely proportional to the resistance of the conductor.

How Ohm's Law is applied in electrical circuits:

Calculating Voltage (V): If the current (I) and resistance (R) in a circuit are known, you can determine the voltage (V) using V = I * R.

Calculating Current (I): If the voltage (V) and resistance (R) in a circuit are known, you can calculate the current (I) using I = V / R.

Calculating Resistance (R): If the voltage (V) and current (I) in a circuit are known, you can calculate the resistance (R) using R = V / I.

Ohm's Law is essential for understanding and analyzing electrical circuits. It helps engineers and technicians design and troubleshoot various electronic devices, such as resistors, capacitors, and conductors. By manipulating the variables in the formula, you can predict how changes in voltage, current, or resistance will affect the overall behavior of a circuit. This knowledge is fundamental in creating safe and efficient electrical systems.
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