🔧 Building an Energy-Converting Device

What you’ll learn

1. Machines That Change EnergyUnderstand that energy-converting devices change electrical energy into light, sound, or movement.An energy-converting device changes energy from one kind into another. A torch turns electrical energy into light, a buzzer turns it into sound, and a motor turns it into movement. Each device takes electricity in and gives something useful out.
2. Build a Simple DeviceBuild a simple energy-converting device by adding a component to a circuit, and control it with a switch.To build a device, start with a circuit of a cell, wires, and a switch, then add a component. A bulb makes light, a buzzer makes sound, and a motor makes movement. Swapping the component changes what the device does while the rest of the circuit stays the same.
3. Energy In, Energy OutUnderstand the conservation of energy and that devices always produce some heat as well as useful energy.Energy is never made or destroyed — the energy going into a device equals the energy coming out, just in different forms. This is the conservation of energy. Every device also makes a little heat, energy that spread out instead of doing the useful job.

Questions this course answers

Grounded in trusted sources

• BBC Bitesize
• Britannica Kids
• The Physics Classroom
• Khan Academy

Every Wunder lesson is built from real, reputable sources — never invented.

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