Standard Science Primary 6 Energy

Which of the following shows the energy conversion that takes place in a solar-powered garden light when it is switched on at night?

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

Step 1: During the day, the solar panel converts light energy into electrical energy, which is stored as chemical potential energy in the battery. Step 2: At night, the chemical potential energy in the battery is converted back to electrical energy. Step 3: The electrical energy is then converted into useful light energy and some wasted heat energy.

Correct answer: Chemical potential energy -> Electrical energy -> Light energy + Heat energy

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