Standard Science Primary 6 Energy

Identify the main energy conversion that takes place when a television is switched on.

A Electrical energy → Chemical potential energy → Light energy
B Light energy → Electrical energy → Sound energy
C Electrical energy → Light energy + Sound energy + Heat energy
D Chemical potential energy → Electrical energy → Kinetic energy
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Worked Solution

Step 1: The input energy is from the power socket (electrical). Step [2-9]: The TV produces images (light) and audio (sound). Step [2-9]: Some energy is always lost as heat due to internal components.

Correct answer: Electrical energy → Light energy + Sound energy + Heat energy

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