Physics A-Level
Reverse bias
What Reverse bias means in Physics A-Level, as defined for AQA.
Definitions of Reverse bias
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Reference: AQA
The condition where the cathode is positive relative to the anode, and the diode blocks until the reverse voltage reaches the Zener voltage.
Operation that creates a wide depletion region and strong internal electric field, giving fast response and linear output.
Topics that use Reverse bias
- Photodiode (A-level only) (AQA A-Level)
- Zener diode (A-level only) (AQA A-Level)
Related terms
- Band gap and photon energy
- Cathode
- Circuit application
- Current limiting
- Current limiting and power dissipation
- Forward bias
- Minimum operating current
- Photo-conductive mode
Using Reverse bias in the exam
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