Question 1 Multiple Choice
What must be true for electric current to flow through a circuit?
AThe wires must be thick
BThe loop must be complete with no gaps
CThere must be two batteries
DThe bulb must be large
Electric current needs a complete, unbroken loop to flow. Any gap in the circuit stops the flow of electricity.
Question 2 True / False
A switch works by opening or closing a gap in a circuit.
Answer: True
When a switch is open, there is a gap in the circuit and current cannot flow. When the switch is closed, the gap is bridged and current flows.
Question 3 Short Answer
Name the three main parts of a simple circuit.
Think about your answer, then reveal below.
Model answer: A power source (battery), a conductor (wire), and a load (light bulb or other device).
Every simple circuit needs something to provide energy, something to carry the current, and something to use the energy.