Standard Science Primary 6 Energy

What is the main energy conversion that takes place when a battery-operated torch is switched on?

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

Step 1: Batteries store chemical potential energy. Step 2: When the circuit closes, it converts to electrical energy. Step 3: The bulb converts electrical energy into light (and some heat).

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

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