Advanced Science Primary 6 Energy

Study the circuit diagram. If Bulb B1 fuses, which of the following will occur?

A Bulbs B2 and B3 will remain lit.
B Only B2 will remain lit.
C The battery will overheat.
D Bulbs B2 and B3 will go out.
Show Worked Solution

Worked Solution

Step 1: Identify B1 is on the main wire connected to the battery. Step 2: B2 and B3 are in a parallel sub-branch. Step 3: If B1 fuses, it creates an open circuit for the entire system. Step 4: No current can reach the parallel branches.

Correct answer: Bulbs B2 and B3 will go out.

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

Start Free Trial — 7 Days Free