Standard Science Primary 5 Systems

Ravi sets up a circuit with a gap labelled X. Which material, when placed across gap X, will cause the bulb to light up?

A A glass rod
B A wooden ruler
C A strip of rubber
D A steel paper clip
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Worked Solution

Step 1: For the bulb to light up, the circuit must be closed. Step 2: The material placed at gap X must be an electrical conductor. Step 3: Metals are good conductors of electricity. Steel is an alloy of iron (a metal).

Correct answer: A steel paper clip

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