FAA Aviation Mechanic General (AMG)Fundamentals of Electricity and ElectronicsHard
A technician installs a semiconductor diode in a power supply circuit to convert alternating current into pulsating direct current. This process is known as:
- AInduction
- BRectification
- CModulation
- DAmplification
Show answer & explanationAnswer & explanation
Correct answer: B. Rectification
A diode's PN junction allows current flow in only one direction (forward bias) and blocks it in the other (reverse bias), converting AC into pulsating DC — a process called rectification.
Why the other options are wrong
- A. Induction refers to generating voltage via a changing magnetic field, not diode action.
- C. Modulation varies a signal's characteristics for transmission, unrelated to diode rectification.
- D. Amplification increases signal strength, typically using transistors.
Diode Rectification
A semiconductor diode conducts current in only one direction, allowing it to convert AC into pulsating DC through rectification.
- Diode has a PN junction
- Forward bias allows current flow
- Reverse bias blocks current flow
- Used in rectifier circuits to produce DC from AC
Memory trick: A diode is a one-way street sign for electrons.