Physics A-Level
Feedback control
What Feedback control means in Physics A-Level, as defined for AQA.
Definition of Feedback control
Check what you remember
Read the wording for your board, then hide it and explain Feedback control in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
A control system compares the count rate with a set value and adjusts rollers to keep thickness constant.
Topics that use Feedback control
- Rutherford scattering (A-level only) (AQA A-Level)
Related terms
- Absorption and shielding
- Absorption experiment
- Absorption of radiation
- Atomic and nuclear structure
- Background radiation
- Background radiation and correction
- Choice of radiation source
- Corrected count rate
Using Feedback control 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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