Question

Volume control regulator in a cd receiver, radio and amplifier also uses

• A. Transistor
• B. Variable resistor
• C. Thermistor
• D. Fixed resistor

Answer 1

The correct option is B Variable resistor

Volume control regulator in a cd receiver, radio and amplifier also uses variable resistor because variable resistor like potentiometer is a three terminal device with a sliding or rotating contact that forms an adjustable voltage devices used for measuring electric potential.As it is used to control picture brightness, contrast , frequency attention changing loudness.