Standard Science Primary 6 Energy

What is the primary energy conversion that takes place when a solar-powered garden light turns on at night?

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

Step 1: At night, the stored energy in the battery is used. Step [2-9]: Electrical energy flows to the bulb. Step [2-9]: The bulb converts electrical energy into light and some wasted heat.

Correct answer: Electrical energy → Light energy + Heat energy

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