Standard Science Primary 6 Energy

What happens to the brightness of a bulb when more batteries are added in series to a circuit?

A The bulb immediately fuses.
B The bulb becomes brighter.
C The brightness remains the same.
D The bulb becomes dimmer.
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Worked Solution

Step 1: Adding batteries in series increases the total voltage. Step 2: Higher voltage pushes more current through the bulb. Step 3: More current results in a brighter bulb.

Correct answer: The bulb becomes brighter.

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