Using and rearranging equations
What Using and rearranging equations means in Physics GCSE, as defined for OCR.
Definitions of Using and rearranging equations
Exam boards and our study guides word this term in slightly different ways. Learn the version your board uses.
Check what you remember
Read the wording for your board, then hide it and explain Using and rearranging equations in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Applying power equals potential difference multiplied by current, and rearranging it so that potential difference equals power divided by current and current equals power divided by potential difference.
Identify the two known values, keep units as volts, amperes and ohms, then multiply current by resistance to find potential difference, or rearrange to find current or resistance.
Identify the two known quantities, then multiply current by time to find charge, or divide charge by time to find current.
Topics that use Using and rearranging equations
- Simple circuits (OCR GCSE)
- Static and charge (OCR GCSE)
Related terms
- Current
- attraction and repulsion
- Cell polarity conventions
- Charge carriers and transfer of electrons
- charge flow
- Charge flow and current
- closed circuit
- conservation of charge
Using Using and rearranging equations 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.
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