DC Ohm's Law Calculator

What is Ohm's Law?

Ohm's Law is a fundamental principle in electrical engineering that describes the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit. It states that the current through a conductor between two points is directly proportional to the voltage across the two points.

The Formulas

Ohm's Law is expressed by the equation:

\[V = I \times R\]

From this, we can derive two other forms:

\[I = \frac{V}{R}\] \[R = \frac{V}{I}\]

Additionally, we can calculate power using:

\[P = V \times I\]

Ohm's Law Triangle

The Ohm's Law triangle is a visual aid that helps remember the relationships between voltage, current, and resistance:

To use the triangle, cover the quantity you want to calculate. The position of the remaining two quantities shows how to calculate the missing one.

Importance of Ohm's Law

Ohm's Law is crucial in electrical engineering and electronics for several reasons:

• It helps in designing and analyzing electrical circuits
• It's used to calculate power consumption and energy efficiency
• It's fundamental in troubleshooting electrical problems
• It's essential for sizing components like resistors, wires, and power supplies

Understanding and applying Ohm's Law is a key skill for anyone working with electrical systems or studying electronics.