LaTeX
V=IRVariables
- V: voltage
- I: current
- R: resistance
How to use this formula
Relates voltage, current, and resistance for an ohmic element.
Important notes
- The relation may not hold for nonlinear components.
Quick example
I=2 A,R=5 Ω gives V=10 V.
Applicability, worked calculation, and verification
Assumptions and domain checks
- The relation may not hold for nonlinear components.
- Use dimensionally consistent units and the sign, coordinate, and reference-frame conventions stated for the problem.
Worked example
I=2 A,R=5 Ω gives V=10 V.
Common mistakes
- Do not combine values with inconsistent units or sign conventions in Ohm Law; perform a dimensional check before accepting the result.
- Verify the result of Ohm Law with a known case, inverse operation, dimensional check, or independent calculation before publishing it.
Continue the workflow
Use Ohm Law 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
V=IR. - 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 Ohm Law used for?
Relates voltage, current, and resistance for an ohmic element.
Can I copy this formula as LaTeX?
Yes. Copy V=IR 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.