Standard Science Primary 5 Systems

An additional bulb is added in parallel to a working circuit. What happens to the brightness of the original bulb?

A It stays the same.
B It becomes dimmer.
C It becomes brighter.
D It goes out.
Show Worked Solution

Worked Solution

Step 1: In a parallel circuit, each branch is independent. Step 2: Adding a new branch doesn't change the voltage across the existing branches. Step 3: Therefore, the brightness of the original bulb remains constant.

Correct answer: It stays the same.

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