Standard Science Primary 6 Energy

Which of the following energy conversions takes place when a television is switched on?

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

Step 1: The input is electrical energy from the power socket. Step [2-9]: The TV produces light (screen) and sound (speakers). Step [2-9]: All electrical devices produce some wasted heat energy.

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

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