Question T6C03
From subelement T6 - T6C
What is component 2 in figure T-1?
Why is this correct?
Component 2 in figure T-1 is a transistor, which is the correct answer. Transistors are three-terminal semiconductor devices used for amplification and switching. The schematic symbol shows the characteristic base, collector, and emitter terminals. Option A (resistor) would show a zigzag line, option C (indicator lamp) would show a circle with a filament symbol, and option D (connector) would show contact points or plug symbols.
Memory tip
Learn to recognize transistor symbols by their distinctive three-terminal structure with an arrow indicating current flow direction. The arrow always points from P-type to N-type material, helping you identify NPN versus PNP types in more advanced circuits.
Learn more
Transistors are fundamental active components in amateur radio equipment, providing amplification in transmitters and receivers. Understanding transistor operation helps you troubleshoot equipment issues and design simple circuits. In practice, transistors in RF applications must be selected for their frequency response and power handling characteristics to maintain proper emission standards and avoid spurious signals.
Think about it
Why do you think transistors require three terminals instead of two like most other basic components?