Circuit Diagram Symbols Quiz

Why are standard circuit diagram symbols important?

• They make circuits more expensive.

• They increase the size of the diagram.

• They simplify complex circuits.

• They make diagrams look more colorful.

What happens when a switch is open in a circuit?

• Current flows freely.

• The circuit is complete.

• No current flows.

• The circuit becomes a battery.

What is the correct term for a single power source in a circuit?

• Voltmeter

• Ammeter

• Cell

• Battery

What does an ammeter measure?

• Voltage

• Temperature

• Resistance

• Current

Which instrument is used to measure potential difference?

• Ammeter

• LDR

• Voltmeter

• Thermistor

What is the function of a fixed resistor in a circuit?

• To increase voltage

• To measure temperature

• To reduce current

• To emit light

How does a thermistor behave with temperature changes?

• Resistance decreases with temperature.

• Resistance increases with temperature.

• It measures voltage.

• It emits light.

What is the primary function of a light-dependent resistor (LDR)?

• To measure current

• To detect light

• To emit sound

• To increase resistance

What is a key characteristic of a diode?

• It measures temperature.

• It only allows current to flow in one direction.

• It emits light.

• It allows current to flow in both directions.

How can you identify an LED in a circuit diagram?

• It has a zigzag line.

• It has a V symbol.

• It has an arrow pointing outwards.

• It has a circle with an A.