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Energy Device Construction Worksheet

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Energy Device Construction Worksheet

A remote weather station needs a small battery-powered signal light. Use the circuit ideas and safety advice on this page to plan, test and explain a simple energy device. Do not connect classroom circuits to a mains power outlet. Keep batteries dry and stop if a component becomes hot or damaged.

Explore the circuit

The circuit is arranged in a loop from a battery, through wires and a bulb, and back to the battery. A switch in the loop is open, leaving a gap in the conducting path.

1.The switch in this circuit is open. Is the conducting path complete, and will the bulb light? Explain why.

2.Choose the safest plan for testing a classroom signal-light circuit.

Use a small battery, dry hands and undamaged components.
Plug wires into a mains power outlet.
Use a wet bench so the wires stay cool.
Keep testing even if the battery becomes hot.

3.Complete the sentence: A material that allows electric current to pass through it is called a .

4.Match each circuit material to its most likely role in a simple battery-powered device.

Copper wire
Plastic covering on a wire
Battery

Provides energy to the circuit
Conductor that carries current between components
Insulator that helps prevent unwanted contact

Plan and test your device

A complete circuit needs a continuous conducting path. A switch opens or closes a gap in that path.

5.Design a simple signal-light circuit using a battery, wires, a switch and a bulb. Draw the components connected in a complete loop, then label the energy source, conductors, control and output component.

6.Predict what will happen when the switch in your planned circuit is closed. Include whether current can flow and what the bulb will do.

7.A bulb does not light when the switch is closed. Give two possible faults you could check safely.

8.True or false? The plastic coating around a copper wire is useful because it is an insulator and reduces the chance of current flowing where it is not wanted.

TrueFalse

9.In a working bulb circuit, electrical energy is transferred by the circuit and transformed mainly into which useful output, as well as some heat?

Light energy
Sound energy
Movement energy
Chemical energy stored in food

10.The signal light works, but its wires keep slipping off the battery terminals. Suggest one improvement and explain how it could make the device more reliable.