Standard Science Primary 5 Systems

Study the circuit diagram. Which bulbs will remain lit if Bulb B2 fuses?

A Only B1
B None of the bulbs
C B1 and B3
D Only B3
Show Worked Solution

Worked Solution

Step 1: Identify the circuit type. Parallel branches allow independent current flow. Step [2-9]: Fusing B2 only breaks the middle branch. Step [2-9]: Current still flows through the top and bottom branches containing B1 and B3.

Correct answer: B1 and B3

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