Advanced Science Primary 5 Systems

Study Circuit Y carefully. Switch S1 is currently open. Which of the following statements is true?

A Both bulbs will light up.
B Only Bulb B1 will light up.
C Both bulbs will not light up.
D Only Bulb B2 will light up.
Show Worked Solution

Worked Solution

Step 1: Identify the arrangement. Circuit Y is a parallel circuit with two branches. Step 2: Switch S1 is on the top branch with Bulb B1. Since it is open, current cannot flow through the top branch. Step 3: The bottom branch with Bulb B2 is closed and connected to the battery, so current flows through it.

Correct answer: Only Bulb B2 will light up.

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