Standard Science Primary 6 Energy

Which of the following correctly describes the energy conversion that occurs in a hair dryer when it is plugged in and switched on?

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

Worked Solution

Step 1: The source is electrical energy from the mains. Step [2-9]: The motor turns (Kinetic), the heating element gets hot (Heat), and the machine makes noise (Sound). Step [2-9]: Therefore, Electrical → Kinetic + Sound + Heat.

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

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