Electrical components

Question 1

What does a fuse do?

Answer 1

• Breaks if the current flowing through is too high

Question 2

What does a diode do and what are the different types?

Answer 2

• Only allows current to flow through in one direction
• Light-emitting diode (LED) = emits light when current flows through it

Question 3

What does an ammeter do?

Answer 3

• Measures the current in a circuit
• Connected in series (current is the same everywhere)

Question 4

What does a voltmeter do and how is it connected?

Answer 4

• Measured potential difference in a circuit
• Connected in parallel

Question 5

What is a fixed resistor and variable resistor?

Answer 5

• Fixed resistor = provides a specific, fixed amount of resistance
• Variable resistor = allows you to modify the amount of resistance

Question 6

What is an LDR and thermistor?

Answer 6

• LDR (Light Dependent Resistor) = resistance decreases as light intensity increases
• Thermistor = resistance decreases as temperature increases