Standard Science Primary 6 Energy

Siti uses a battery-operated flashlight to read her book at night. Which of the following shows the energy conversion that takes place when the flashlight is switched on?

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

Step 1: The battery stores chemical potential energy. Step [2-9]: When switched on, the chemical energy is converted to electrical energy flowing through the circuit. Step [2-9]: The bulb converts electrical energy into light energy and some wasted heat energy.

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

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