Understanding Circuit Components and Symbols

What is the role of a switch in an electrical circuit?

• To measure the current

• To increase the voltage

• To control the flow of electricity

• To decrease the resistance

Which component breaks the circuit if too much current flows through it?

• Diode

• LED

• Filament lamp

• Fuse

What is a unique feature of a light-emitting diode (LED)?

• It breaks the circuit if current is too high

• It measures potential difference

• It emits light when current flows through it

• It allows current to flow in both directions

How is an ammeter connected in a circuit to measure current?

• In parallel

• In series

• Across the power source

• Next to a resistor

What happens to the resistance of a thermistor as the temperature increases?

• It fluctuates randomly

• It decreases

• It increases

• It remains constant