Standard Science Primary 6 Energy

What is the main energy conversion that takes place when a television is switched on?

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

Step 1: The source is mains electricity (Electrical energy). Step [2-9]: The useful output is images (Light) and audio (Sound). Step [2-9]: Heat is a byproduct of the electrical components.

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

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