PhysicsChapter 6: Alternating Current
Half-Wave Rectification
Rectification
Definition
Rectification is the conversion of alternating current into a unidirectional current. A half-wave rectifier uses one half-cycle of the AC input while blocking the other.
Important Point
A semiconductor diode conducts primarily in one direction. In a simple half-wave rectifier: during one half-cycle, the diode is forward biased and current flows; during the opposite half-cycle, the diode is reverse biased and ideally blocks current. The output is therefore pulsating DC. The output is not perfectly steady DC. It contains gaps because only one half of each AC cycle is used.
Purpose
Rectification is important when an AC supply must be converted into a DC-like output for electronic circuits.
Formula / Key Relation
Core conceptual relation: **AC input → diode → pulsating DC output**
Exam preparation
Exam Focus
Quick revision
Revision Zone
Review the key facts, formulas and checks before you move on.Half-Wave Rectification
Sticky Notes · Quick Revision
Half-wave:
- 1 diode
- One half passes
- Other half blocked
- Output = pulsating DC
60-second revision
- Half-wave rectification converts only one half of AC into output.
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