Advanced Science Primary 6 Energy

In a parallel circuit with three bulbs, one bulb fuses. What happens to the other two bulbs?

A They go out.
B They stay lit with the same brightness.
C They become brighter.
D They become dimmer.
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Worked Solution

Step 1: Understand parallel circuits have multiple paths for current. Step 2: If one path is broken (fused bulb), current can still flow through other branches. Step 3: The voltage across each branch remains constant, so brightness stays the same.

Correct answer: They stay lit with the same brightness.

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