Standard Science Primary 6 Energy

An extra battery is added in series to the circuit below. What will happen to the brightness of the bulb?

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

Step 1: Adding batteries in series increases the electrical energy in the circuit. Step 2: More energy flowing through the bulb results in increased brightness.

Correct answer: The bulb will be brighter.

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