Standard Science Primary 5 Systems

Michael tested several materials by placing them in a gap in an electrical circuit. Which of the following will cause the bulb to light up?

A Plastic spoon
B Wooden ruler
C Rubber eraser
D Iron nail
Show Worked Solution

Worked Solution

Step 1: For a bulb to light up, the circuit must be closed. Step [2-9]: This requires an electrical conductor to be placed in the gap. Step [2-9]: Iron is a metal and an electrical conductor.

Correct answer: Iron nail

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