Standard Science Primary 6 Energy

Siti set up a circuit with two bulbs and two batteries in series. If she adds one more bulb in series to the circuit, what will happen to the brightness of the bulbs?

A The bulbs will become dimmer.
B The bulbs will become brighter.
C The brightness will remain the same.
D The bulbs will not light up at all.
Show Worked Solution

Worked Solution

Step 1: Identify the circuit type (Series). Step 2: Recognize that adding bulbs in series increases the total resistance. Step 3: Higher resistance leads to less current flowing through each bulb, making them dimmer.

Correct answer: The bulbs will become dimmer.

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