Quiz on Variable Resistors

What is a variable resistor?

• A resistor used only in AC circuits

• A resistor that cannot be adjusted

• A resistor that can change its resistive value

• A resistor with a fixed value

Which of the following is a type of variable resistor?

• Inductor

• Transformer

• Capacitor

• Rheostat

What happens to the current in a circuit when the slider arm of a rheostat is moved toward point A?

• Current stops flowing

• Current remains the same

• Current increases

• Current decreases

How many terminals does a potentiometer have?

• Two

• Five

• Three

• Four

What is the primary use of a potentiometer?

• To vary current

• To measure resistance

• To vary voltage

• To store energy

What is the function of the wiper in a potentiometer?

• To connect the potentiometer to the circuit

• To decrease the voltage

• To increase the total resistance

• To vary the resistance between terminals

What type of variable resistor is temperature sensitive?

• Rheostat

• Photoconductive Cell

• Potentiometer

• Thermistor

What is the behavior of a thermistor as temperature increases?

• Resistance fluctuates

• Resistance increases

• Resistance decreases

• Resistance remains constant

What controls the resistance in a photoconductive cell?

• Temperature

• Current

• Voltage

• Light intensity

In a linear potentiometer, how does the resistance change with the position of the wiper?

• It changes exponentially

• It varies randomly

• It varies linearly

• It remains constant