Standard Science Primary 6 Energy

Which of the following shows the energy conversion that occurs in a television when it is switched on?

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

Step 1: A television uses electricity from a wall socket. Step 2: It produces a screen image (light) and audio (sound). Step 3: Heat is always a byproduct of electrical resistance.

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

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