Standard Science Primary 6 Energy

Tim connects three identical bulbs in a series circuit. If one bulb fuses, what will happen to the other two bulbs?

A They will not light up.
B They will become dimmer.
C They will remain at the same brightness.
D They will become brighter.
Show Worked Solution

Worked Solution

Step 1: In a series circuit, there is only one path for the electric current to flow. Step 2: If a bulb fuses, the filament breaks, creating an open circuit. Step 3: Because the path is broken, current cannot flow to the other bulbs, so they will not light up.

Correct answer: They will not light up.

Want more questions like this? Superholic Lab has 10,000+ MOE-aligned questions with full worked solutions.

Start Free Trial — 7 Days Free