Standard Science Primary 5 Systems

Jun Jie set up a circuit with three bulbs connected in series. What will happen if the middle bulb fuses?

A Only the fused bulb will go out; the rest remain lit.
B The first bulb will light up, but the third will not.
C The other two bulbs will become brighter.
D All three bulbs will not light up.
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Worked Solution

Step 1: In a series circuit, there is only one path for the electric current to flow. Step 2: If any bulb fuses, the filament breaks, creating a gap in the circuit. Step 3: This results in an open circuit, meaning no current can flow through any part of the loop. Step 4: Therefore, all bulbs will go out.

Correct answer: All three bulbs will not light up.

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