Standard Science Primary 6 Energy

When a television is switched on, which of the following represents the main energy conversions taking place?

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

Step 1: The input energy is electricity from the power socket. Step 2: The useful outputs are images (Light) and audio (Sound). Step 3: Heat is an unavoidable byproduct in electrical appliances.

Correct answer: Electrical energy -> Light energy + Sound energy + Heat energy

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