Standard Science Primary 5 Systems

Study the circuit diagram below. What will happen if Bulb X fuses?

A Bulb Y remains lit.
B Bulb Y goes off.
C Bulb Y becomes brighter.
D Bulb Y becomes dimmer.
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Worked Solution

Step 1: Identify the circuit arrangement. The components are arranged in a single loop (series circuit). Step 2: If Bulb X fuses, its filament breaks, creating a gap in the circuit. Step 3: This results in an open circuit, preventing electric current from flowing through the entire loop. Step 4: Therefore, Bulb Y will go off.

Correct answer: Bulb Y goes off.

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