Standard Science Primary 5 Systems

Study Circuit A. If Switch S1 is open and Bulb L1 is fused, which of the following is true?

A Current flows through the switch but not the bulb.
B The other bulbs in the circuit will become brighter.
C The battery will run out of energy faster.
D The circuit is open and no current flows.
Show Worked Solution

Worked Solution

Step 1: An open switch or a fused bulb creates a gap in the circuit. Step 2: Electricity can only flow in a continuous, closed loop. Step 3: Since there are gaps, the circuit is open and no current can flow.

Correct answer: The circuit is open and no current flows.

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