Physics A-Level
Forward and reverse bias
What Forward and reverse bias means in Physics A-Level, as defined for OCR.
Definition of Forward and reverse bias
Check what you remember
Read the wording for your board, then hide it and explain Forward and reverse bias in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
A diode conducts only above a forward threshold and blocks reverse current, and an LED is a diode that emits light when forward biased.
Topics that use Forward and reverse bias
- Resistance (OCR A-Level)
Related terms
- Circuit design for measurement
- Component protection
- Current–voltage characteristics
- Data logging and graphing
- Graph interpretation
- Light intensity as a variable
- Non-ohmic behaviour
- Ohm’s law
Using Forward and reverse bias in the exam
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