Physics A-Level
Lost volts
What Lost volts means in Physics A-Level, as defined for OCR.
Definition of Lost volts
Check what you remember
Read the wording for your board, then hide it and explain Lost volts in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
The potential difference across the internal resistance of the source, equal to Ir, where I is the current and r is the internal resistance.
Topics that use Lost volts
- Internal resistance (OCR A-Level)
Related terms
- Electromotive force and internal resistance
- Energy transfer per unit charge in a source
- Terminal potential difference
- Terminal potential difference and lost volts
- Circuit equations and algebraic rearrangement
- Electromotive force
- Internal resistance
Using Lost volts in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Physics questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Physics A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge