Standard Science Primary 5 Systems

Siti wants to test if Material X is an electrical conductor. She places it in the gap of the circuit shown below. The bulb lights up. What could Material X be?

A An iron nail
B A wooden stick
C A glass rod
D A plastic ruler
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Worked Solution

Step 1: The bulb lights up, meaning the circuit is closed. Step 2: Material X must allow electric current to flow through it (an electrical conductor). Step 3: Metals are good conductors of electricity. An iron nail is made of metal.

Correct answer: An iron nail

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