Resistors and Potentiometers
A resistor is a circuit element that opposes the flow of current in a circuit. It is characterized by its resistance which is measured in ohms.
A potentiometer is a variable resistor used where an adjustable amount of resistance is necessary, (for example in an audio volume control).
Exam Questions
What electrical component is used to oppose the flow of current in a DC circuit?
A. Inductor
B. Resistor
C. Voltmeter
D. Transformer
What type of component is often used as an adjustable volume control?|
A. Fixed resistor
B. Power resistor
C. Potentiometer
D. Transformer
What electrical parameter is controlled by a potentiometer?
A. Inductance
B. Resistance
C. Capacitance
D. Field strength