Advanced Science Primary 5 Systems

Look at the circuit diagram. If Bulb B1 fuses, what will happen to Bulb B2?

A It will remain lit with the same brightness.
B It will become brighter.
C It will not light up.
D It will become dimmer.
Show Worked Solution

Worked Solution

Step 1: Analyze the circuit diagram. The battery and two bulbs are arranged in a single loop. Step 2: This is a series circuit. Step 3: In a series circuit, there is only one path for electricity to flow. Step 4: If B1 fuses, the circuit is broken (open circuit), and no current can flow to B2.

Correct answer: It will not light up.

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