Standard Science Primary 6 Energy

Which sequence correctly shows the energy conversion when a battery-operated torch is switched on?

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

Step 1: The battery stores chemical potential energy. Step 2: When switched on, this is converted into electrical energy in the circuit. Step 3: The bulb converts electrical energy into light and heat energy. Step 4: Sequence: Chemical → Electrical → Light + Heat.

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

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