Standard Science Primary 6 Energy

Jun Jie added another battery in series to a simple circuit with one bulb. What will happen to the brightness of the bulb?

A The bulb will have the same brightness.
B The bulb will be brighter.
C The bulb will not light up.
D The bulb will be dimmer.
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Worked Solution

Step 1: Adding batteries in series increases the voltage/current. Step 2: More current flowing through the bulb filament makes it glow more intensely. Step 3: The bulb becomes brighter.

Correct answer: The bulb will be brighter.

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