Six mark questions

Question 1

A resistor is a circuit component.
Two other circuit components are a light dependent resistor (LDR) and a
thermistor.
Explain how LDRs and thermistors can be used to control the current in a circuit.

Answer 1

Answer may include:

Light dependent resistors (LDR):

1. Resistance changes with light intensity
2. Bright light , low resistance
3. No light (dark), high resistance

Thermistor:

1. Resistance changes with temperature
2. High temperature, low resistance
3. Low temperature, high resistance