Standard Science Primary 6 Energy

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

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

Step 1: Identify the source. A battery stores energy as chemical potential energy. Step 2: When the circuit is closed, chemical energy is converted to electrical energy. Step 3: The bulb converts electrical energy into light and some heat energy.

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

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