Standard Science Primary 6 Energy

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

A Kinetic Energy -> Sound Energy + Light Energy
B Electrical Energy -> Light Energy + Sound Energy + Heat Energy
C Electrical Energy -> Chemical Potential Energy -> Sound Energy
D Chemical Potential Energy -> Electrical Energy -> Light Energy
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Worked Solution

Step 1: The input is electricity from the power source. Step 2: The TV produces pictures (light) and noise (sound). Step 3: It also gets warm after use (heat).

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

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