Advanced Science Primary 6 Energy

Study the circuit below. Which energy conversion takes place when the switch is closed?

A Electrical energy → Chemical potential energy → Kinetic energy
B Light energy → Electrical energy → Heat energy
C Chemical potential energy → Kinetic energy → Sound 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 the circuit is closed, it converts to electrical energy. Step [2-9]: The bulb converts electrical energy to useful light and wasted heat.

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

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