Standard Science Primary 5 Systems

Siti set up the circuit as shown below. What will happen to the remaining bulbs if Bulb X fuses?

A Only Bulb Z will stay lit.
B Only Bulb Y will stay lit.
C All the other bulbs will go out.
D Bulbs Y and Z will both stay lit.
Show Worked Solution

Worked Solution

Step 1: Identify that Bulb X is in its own parallel branch. Step 2: When a bulb fuses in a parallel branch, the other branches remain closed circuits. Step 3: Electricity can still flow through Bulbs Y and Z.

Correct answer: Bulbs Y and Z will both stay lit.

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