Physics A-Level
P = V²/R
What P = V²/R means in Physics A-Level, as defined for OCR.
Definition of P = V²/R
Check what you remember
Read the wording for your board, then hide it and explain P = V²/R in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Obtained by substituting I = V/R into P = VI, and useful when voltage and resistance are known.
Topics that use P = V²/R
- Power (OCR A-Level)
Related terms
- Efficiency
- Force and motion
- Mechanical power
- Power
- SI units and conversions
- Unit conversion of time
- Application of W = VIt to real components
- conversion between kW h and joules
Using P = V²/R in the exam
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