Ohm's Law with Power Calculator

What is Ohm's Law with Power?

Ohm's Law with Power is a fundamental principle in electrical engineering that relates voltage, current, resistance, and power in an electrical circuit. It combines Ohm's Law (V = I × R) with the power equation (P = V × I) to provide a comprehensive understanding of electrical relationships.

The Formulas

The key formulas for Ohm's Law with Power are:

• V = I × R (Ohm's Law)
• P = V × I (Power equation)
• P = I² × R (Power in terms of current and resistance)
• P = V² / R (Power in terms of voltage and resistance)

Where:

• V is voltage in volts (V)
• I is current in amperes (A)
• R is resistance in ohms (Ω)
• P is power in watts (W)

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 remaining visible quantities show the formula to use
• For example, covering 'V' leaves 'I × R', which is the formula for voltage