Standard Science Primary 6 Energy

Which of the following energy conversions takes place in a solar-powered garden light when it is used at night?

A Light energy → Electrical energy
B Chemical potential 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: During the day, solar energy is stored as chemical potential energy in the battery. Step 2: At night, the battery converts chemical energy into electrical energy. Step 3: The LED then converts electrical energy into light and heat.

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

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