Standard Science Primary 5 Systems

Four bulbs are connected in a series circuit. If one bulb fuses, what happens to the remaining three bulbs?

A They will remain lit.
B They will unlight.
C They will become brighter.
D They will become dimmer.
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Worked Solution

Step 1: Identify the circuit type (Series). Step 2: Recall that in series, current has only one path. Step 3: A fused bulb creates an open circuit, so no current flows to any bulb.

Correct answer: They will unlight.

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