Standard Science Primary 5 Systems

Study the circuit diagram below. What will happen to Bulb B1 and Bulb B3 if Bulb B2 fuses?

A Bulb B1 will go out, but Bulb B3 will remain lit.
B Both Bulb B1 and Bulb B3 will remain lit.
C Both Bulb B1 and Bulb B3 will go out.
D Bulb B1 will remain lit, but Bulb B3 will go out.
Show Worked Solution

Worked Solution

Step 1: Identify that the bulbs are connected in a parallel circuit. Step 2: Each bulb has its own separate pathway to the battery. Step 3: If Bulb B2 fuses, only its specific branch is broken. Step 4: Current can still flow through the branches of Bulb B1 and Bulb B3, so they remain lit.

Correct answer: Both Bulb B1 and Bulb B3 will remain lit.

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