LaTeX
P=VIVariables
- P: power
- V: voltage
- I: current
How to use this formula
Calculates electrical power from voltage and current.
Important notes
- For DC resistive circuits, equivalent forms include I²R and V²/R.
Quick example
12 V at 2 A uses 24 W.
Applicability, worked calculation, and verification
Assumptions and domain checks
- For DC resistive circuits, equivalent forms include I²R and V²/R.
- Use dimensionally consistent units and the sign, coordinate, and reference-frame conventions stated for the problem.
Worked example
12 V at 2 A uses 24 W.
Common mistakes
- Do not combine values with inconsistent units or sign conventions in Electric Power; perform a dimensional check before accepting the result.
- Verify the result of Electric Power with a known case, inverse operation, dimensional check, or independent calculation before publishing it.
Continue the workflow
Use Electric Power in your own work
- Check the domainMatch the variables and assumptions to the problem before substituting values.
- Copy the exact notationPreserve grouping, signs, and exponents in
P=VI. - Edit or convertOpen the expression in the LaTeX editor, then export it for your document or web page.
Review and verification
Last reviewed: 2026-07-23
Automated quality check: Kept noindex until the missing evidence is supplied.
Formula references
- College Physics 2eOpenStax, Rice University — Reviewed physical quantities, units, mechanics, energy, waves, electricity, and applied formulas.
Frequently asked questions
What is the Electric Power used for?
Calculates electrical power from voltage and current.
Can I copy this formula as LaTeX?
Yes. Copy P=VI or open it in the LaTeX editor.
What should I check before using it?
Confirm that each variable, unit, domain restriction, and assumption matches the problem.