Standard Science Primary 6 Energy

Which of the following shows the correct energy conversion when a battery-operated flashlight is switched on?

A Chemical potential energy -> Kinetic energy -> Light energy
B Kinetic energy -> Electrical energy -> Light energy
C Chemical potential energy -> Electrical energy -> Light energy + Heat 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 converts into electrical energy. Step 3: The bulb converts electrical energy into light energy (the useful output) and heat energy (waste).

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

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