Advanced Science Primary 5 Systems

Michael added another bulb in parallel to an existing circuit. What will happen to the brightness of the first bulb?

A It will not light up.
B It becomes dimmer.
C It becomes brighter.
D It remains the same.
Show Worked Solution

Worked Solution

Step 1: In a parallel circuit, each branch has the same voltage as the source. Step 2: Adding a bulb in a new parallel branch does not change the current flowing through the original branch. Step 3: Therefore, the brightness remains unchanged.

Correct answer: It remains the same.

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