Standard Science Primary 6 Energy

Ravi tested several objects in a circuit. Which material will NOT allow the bulb to light up?

A Plastic ruler
B Graphite pencil lead
C Iron nail
D Copper wire
Show Worked Solution

Worked Solution

Step 1: A bulb lights up if the circuit is closed by a conductor. Step 2: Metals and graphite are conductors. Step 3: Plastic is an insulator and will break the circuit.

Correct answer: Plastic ruler

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