Potential Divider and Thermistor Quiz

What is a potential divider circuit?

• A circuit that divides current evenly between resistors

• A circuit that divides voltage between resistors

• A circuit that splits power across multiple components

• A circuit that increases voltage

How does a potential divider circuit work?

• It divides current based on the resistance values

• It divides voltage according to the ratio of resistances

• It powers components equally

• It increases the input voltage

What components are commonly used in potential divider circuits?

• Resistors

• Capacitors

• Transistors

• Inductors

What is a thermistor?

• A resistor whose resistance depends on light

• A resistor whose resistance depends on temperature

• A type of transistor

• A type of capacitor

How does a thermistor behave in a potential divider circuit?

• Its resistance increases as the temperature increases

• Its resistance decreases as the temperature increases

• Its resistance stays constant regardless of temperature

• It does not affect the output voltage

How would you use a thermistor in a potential divider circuit?

• To measure temperature by changing the voltage output

• To measure light intensity

• To control the current through a circuit

• To create a constant voltage source

What is an LDR (Light Dependent Resistor)?

• A resistor that changes resistance with light intensity

• A resistor that changes resistance with temperature

• A type of sensor used in thermometers

• A component that stores electrical energy

How does an LDR work in a potential divider circuit?

• It controls the current through the circuit

• Its resistance increases as light intensity increases

• Its resistance decreases as light intensity increases

• It does not affect the voltage output

What is a common application of a potential divider circuit?

• To measure light levels using an LDR

• To store energy in a capacitor

• To increase the current in a circuit

• To amplify sound signals

Light conditions: the resistance of the LDR (R1) is ​ (a)   and therefore so is the p.d. across the LDR (R1).

The means the resistance of R2 is relatively ​ (b)   (and therefore p.d. across R2 is large). So the reading on the ​ (c)   (which can calibrated/converted into a unit of light intensity) will be large.

• small
• large
• voltmeter