What is a requirement for a functioning electrical circuit?

• Broken wire

• Closed circuit

• Open circuit

• A single battery without connections

When the radio produces sound, it demonstrates that the radio must have a –

• Powerful magnet

• Rechargeable battery

• Closed circuit

• Plastic cord

A _______ can disrupt a functioning electrical circuit.

• Partially charged battery

• Solid wire

• Fully charged battery

• Broken wire

Which of the following is NOT required for a functioning electrical circuit?

• A) Power source

• B) Conducting path

• C) Load (output device)

• D) Insulator

A student attached the parts as shown here, and the bulb did not light. Which of the following statements could be the reason the bulb does NOT light? Select TWO correct answers.

• Batteries can't provide electric energy.

• The flow of electricity can't make a bulb light up.

• The switch is open.

• Straws do not conduct electricity.

• The wire should be replaced with a longer one.

A switch is important in a functioning electrical circuit because:

• it allows the circuit to be opened or closed, controlling the flow of electricity.

• it provides power to the circuit.

• it acts as a resistor in the circuit.

• it stores electrical energy for later use.

Which of these best completes the circuit?

• rubber band
• metal nail
• leather shoelace
• wooden toothpick

Will the light bulb in this circuit light and why/why not?

• yes, because it has two batteries
• no, because the switch is open
• yes, because it is in a circuit
• no, because the bulb is burned out

If bulb 1 burns out, what will occur?

• bulbs 2 and 3 will go out
• bulbs 2 and 3 receive more volts
• bulbs 2 and 3 will stay lit
• nothing will happen

The diagram shows a series circuit with three lit bulbs. How many of the bulbs will remain lit if the wire is cut a the point shown by the arrow?

• 0

• 1

• 2

• 3