a. A resistor is a fixed component that provides a constant level of resistance, while a potentiometer is an adjustable component that can vary its resistance.
b. A potentiometer is a fixed component that provides a constant level of resistance, while a resistor is an adjustable component that can vary its resistance.
c. A resistor and a potentiometer are the same thing.
d. A resistor and a potentiometer both store electrical charge.
Answer: a. A resistor is a fixed component that provides a constant level of resistance, while a potentiometer is an adjustable component that can vary its resistance.