Standard Science Primary 6 Energy

Siti used a hair dryer to dry her hair. Which of the following correctly shows the energy conversion taking place in the hair dryer?

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

Worked Solution

Step 1: Identify the input energy (Electricity from the wall socket). Step 2: Identify the outputs. The fan moves (Kinetic), it gets hot (Heat), and it is noisy (Sound). Step 3: Correct conversion: Electrical → Kinetic + Sound + Heat.

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

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