Standard Science Primary 6 Energy

When a switch in a circuit is closed, a bulb lights up. Which of the following correctly shows the energy conversion that takes place?

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

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

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

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