Standard Science Primary 5 Systems

Study the parallel circuit. Bulb X has fused. What will happen to Bulb Y?

A Bulb Y will go out.
B Bulb Y will fuse as well.
C Bulb Y will become dimmer.
D Bulb Y will remain lit.
Show Worked Solution

Worked Solution

Step 1: The circuit is arranged in parallel, meaning there are separate paths for the electric current. Step 2: When Bulb X fuses, only the top branch becomes an open circuit. Step 3: Current can still flow from the battery through the bottom branch containing Bulb Y. Step 4: Therefore, Bulb Y remains lit.

Correct answer: Bulb Y will remain lit.

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