Physics A-Level
Ratchet
What Ratchet means in Physics A-Level, as defined for OCR.
Definition of Ratchet
Check what you remember
Read the wording for your board, then hide it and explain Ratchet in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
A part of the micrometer used to apply consistent pressure and avoid over-tightening, compressing the object or damaging the instrument.
Topics that use Ratchet
- Practical skills (OCR A-Level)
Related terms
- Accuracy and precision
- Amplitude
- Analogue measurement
- Apparatus selection
- Background radiation
- Circuit symbols and component recognition
- Computer modelling
- Data logger
Using Ratchet 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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