Standard Science Primary 6 Energy

What is the main energy conversion that occurs in a hair dryer when it is switched on?

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

Step 1: A hair dryer uses electricity as its source. Step 2: It has a fan that moves (kinetic energy) and a heating element (heat energy). Step 3: It also produces noise (sound energy). Step 4: The conversion is Electrical to Kinetic + Heat + Sound.

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

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