Advanced Science Primary 6 Energy

Study the circuit diagram. If Bulb B1 fuses, which other bulbs will remain lit?

A Both B2 and B3
B Only B3
C None
D Only B2
Show Worked Solution

Worked Solution

Step 1: Identify that B1 and B2 are in series with each other on one branch. Step 2: B3 is on a separate parallel branch. Step 3: A fused bulb in series breaks the circuit for that branch (B2 goes out), but parallel branches remain unaffected.

Correct answer: Only B3

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