Standard Science Primary 6 Energy

Michael added another battery in series to his circuit. What will happen to the brightness of the bulb?

A The bulb will fuse immediately.
B The bulb will stay the same brightness.
C The bulb will become brighter.
D The bulb will become dimmer.
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Worked Solution

Step 1: Batteries in series increase the flow of current in a circuit. Step 2: More current passing through the filament of a bulb results in more light energy. Step 3: The bulb glows brighter.

Correct answer: The bulb will become brighter.

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