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Virtual Circuit Investigation

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Virtual Circuit Investigation

A signal lamp needs a complete circuit to shine. Use the circuit clues on this page to predict, diagnose faults and design a safe fix. You do not need a device or simulation. Assume all components are ideal and the battery is low-voltage.

Read the circuit clues

A closed circuit forms an unbroken path from one battery terminal, through the wires and globe, and back to the other battery terminal. The battery transfers energy to charges in the circuit. A switch opens or closes the path. A break anywhere in the path stops the current, so the globe will not light.

Battery (+) ─── wire ─── [closed switch] ─── globe ─── wire ─── Battery (−) The wire ends touch the correct battery terminals and the globe’s two contacts.

Diagnose the signal lamp

For each case, decide whether the globe lights. Then identify the circuit clue that supports your decision.

1.Case A: The switch is closed. Both wires are firmly connected, and the globe’s two metal contacts are connected into the loop. Will the globe light? Explain why.

2.Case B: Everything is connected as in Case A, but the switch is open. Choose the best explanation.

The open switch breaks the path, so current cannot flow.
The battery has too much energy for the globe.
An open switch makes the wires conduct better.

3.Case C: The switch is closed, but one wire has come loose from the battery’s negative terminal. What happens to the globe, and what is the simplest repair?

4.Case D: A globe is connected by only one wire, with no other connection to its contacts. Is this a complete circuit? Explain.

5.Case E: A battery is removed, but the wires, switch and globe remain connected in a loop. Which essential part is missing, and what should be done?

6.A globe has two metal contacts: the small tip at its base and the threaded metal side. To light, each contact must connect to a different side of the circuit. What connection error could stop it lighting?

Test your understanding

Use the circuit ideas above to solve the final challenges.

7.Complete the sentence: A circuit must be for current to flow through the globe.

8.A group finds a globe that stays off. Their switch is closed and their battery is connected. Name two different checks they could make to find a fault.

9.Design a simple signal lamp circuit using one battery, one globe, one switch and wires. Describe the path from one battery terminal back to the other, and explain how the switch controls the globe.

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More Science Worksheets

Year 6

Virtual Circuit Investigation

Virtual Circuit Investigation

Read the circuit clues

Diagnose the signal lamp

Test your understanding

2 printable pages

About This Worksheet

Free in Kuraplan

Print-Ready

AI-Generated

For Teachers & Parents

Need a custom version of this worksheet?

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