ASVAB (Armed Services Vocational Aptitude Battery)Electronics Information (EI)Medium
Which type of semiconductor device is commonly used as an electronic switch or amplifier?
- ACapacitor
- BResistor
- CInductor
- DTransistor
Show answer & explanationAnswer & explanation
Correct answer: D. Transistor
A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. It is one of the fundamental building blocks of modern electronic devices.
Why the other options are wrong
- A. Capacitors store electrical energy in an electric field.
- B. Resistors are passive components that oppose current flow.
- C. Inductors store energy in a magnetic field.
Transistor
A semiconductor device used to amplify or switch electronic signals and electrical power.
- Has at least three terminals (e.g., Base, Collector, Emitter for BJT; Gate, Drain, Source for FET).
- Can operate as a switch (on/off) or an amplifier (boosting signal strength).
- Forms the basis of integrated circuits and modern digital electronics.
Memory trick: Switches & Amps are Transistors' Main Jobs.