Standard Science Primary 6 Energy

When a television is switched on, electrical energy is converted into several other forms. Which form is usually the LEAST useful for the viewer?

A Kinetic energy
B Sound energy
C Light energy
D Heat energy
Show Worked Solution

Worked Solution

Step 1: The purpose of a TV is to provide visuals (light) and audio (sound). Step 2: Heat is produced as a byproduct of the electrical components working. Step 3: This heat is wasted energy and not useful to the viewer.

Correct answer: Heat energy

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