Standard Science Primary 6 Energy

Study Circuit X. All bulbs are identical and working properly initially. If bulb B2 fuses, what will happen to bulbs B1 and B3?

A Only B3 will remain lit.
B Both B1 and B3 will remain lit.
C Both B1 and B3 will go out.
D Only B1 will remain lit.
Show Worked Solution

Worked Solution

Step 1: Identify the circuit arrangement. The bulbs are in a parallel circuit. Step 2: In a parallel circuit, there are multiple pathways for current to flow. Step 3: If B2 fuses, only the middle branch is broken. Current can still flow through the top branch (B1) and bottom branch (B3). Step 4: Therefore, B1 and B3 will remain lit.

Correct answer: Both B1 and B3 will remain lit.

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