Standard Science Primary 5 Systems

Study the circuit diagram. Where should a switch be placed so that it can turn off Bulb X without turning off Bulb Y?

A Between Bulb X and Bulb Y on the main wire.
B On the wire branch connecting only to Bulb Y.
C On the main wire next to the battery.
D On the wire branch connecting only to Bulb X.
Show Worked Solution

Worked Solution

Step 1: Identify that Bulb X and Bulb Y are in a parallel arrangement. Step 2: To control Bulb X independently, the switch must be on the specific branch circuit for Bulb X. Step 3: Placing it on the main wire would control both bulbs.

Correct answer: On the wire branch connecting only to Bulb X.

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