Standard Science Primary 6 Energy

Suling used a hairdryer to dry her hair. Which of the following correctly shows the energy conversion that took place?

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

Worked Solution

Step 1: The hairdryer is plugged into a power socket (Electrical energy). Step [2-9]: It turns a motor/fan (Kinetic) and heats up a coil (Heat). Step [2-9]: It also produces a loud noise (Sound).

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

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