Standard Science Primary 6 Energy

Which of the following represents the main energy conversion that takes place when a television is switched on?

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

Step 1: The source is electricity from the wall socket. Step [2-9]: The screen produces light and the speakers produce sound. Step [2-9]: Electrical components also release heat as a byproduct.

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

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