January 27, 2014

FCC Technician Exam Question Of The Day (T6A02)

Q) What type of component is often used as an adjustable volume control?

A) Potentiometer

NJ2X Notes:
The potentiometer (or "pot") is a variable resistor. 


These are commonly used in electronic devices as a three-terminal resistor with a continuously adjustable tapping point controlled by rotation of a shaft or knob.  These variable resistors are known as potentiometers when all three terminals are present, since they act as a continuously adjustable voltage divider. A common example is a volume control for a radio, audio amplifier, or audio mixer.