Standard Science Primary 6 Energy

Ravi is using a battery-operated fan. Which of the following shows the correct energy conversion taking place when the fan is switched on?

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

Worked Solution

Step 1: Identify the power source. A battery stores chemical potential energy. Step 2: When switched on, the battery produces electrical energy. Step 3: The motor converts electrical energy into kinetic energy (movement of blades) and heat energy (wasted energy). Step 4: The final answer is Chemical potential energy → Electrical energy → Kinetic energy + Heat energy.

Correct answer: Chemical potential energy → Electrical energy → Kinetic energy + Heat energy

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