Standard Science Primary 5 Systems

Study the circuit diagram. Which bulbs will light up when only Switch S2 is closed?

A Both B1 and B2
B Neither B1 nor B2
C Only B2
D Only B1
Show Worked Solution

Worked Solution

Step 1: Identify the circuit as a parallel arrangement. Step [2-9]: Switch S2 is in series with Bulb B2 on its own branch. Step [2-9]: Closing S2 completes the pathway for B2 only.

Correct answer: Only B2

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