Standard Science Primary 6 Energy

What is the main energy conversion that takes place when an electric fan is switched on?

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

Step 1: Identify the source of energy (Electricity from the wall socket). Step [2-9]: Identify the primary action (Moving blades = Kinetic energy). Step [2-9]: Identify the secondary/wasted energy (Whirring sound).

Correct answer: Electrical energy -> Kinetic energy + Sound energy

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