Olibits / Science / Electrical Systems
Primary 5 Science: Electrical Systems Practice
Real Primary 5 Science questions on Electrical Systems, pulled directly from the Olibits question bank — the same questions a child would actually see, not separately written for this page.
Curriculum alignment
Science Teaching & Learning Syllabus, Primary Three to Six (MOE, 2023 syllabus)
Science is not a taught subject at P1/P2 under MOE's own syllabus — our P1/P2 Science content is offered as enrichment beyond the official syllabus, not as a claim of syllabus coverage at those grades.
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Real Electrical Systems practice questions
In an open circuit, does the bulb light up?
Yes, because the circuit is complete
No, because the circuit is not complete ✓
In an open circuit, there is a gap in the loop, so current cannot flow and the bulb will not light up.
What is the main function of a battery (or cell) in a circuit?
To act as an insulator
To produce sound energy
To provide the electrical energy that pushes current through the circuit ✓
To stop current from flowing
A battery supplies the electrical energy needed to make current flow around a circuit.
Why are the handles of screwdrivers usually made of plastic?
Plastic conducts electricity well
Plastic is heavier than metal
Plastic melts at a low temperature
Plastic is an insulator, so it protects the user from electric shocks ✓
Because plastic is an insulator, it does not conduct electricity, keeping the user safe from shocks when working with wires.
Why are electrical wires usually covered with a layer of rubber or plastic?
To make the wires produce light
To make the wires conduct electricity better
To make the wires heavier
To insulate the wires and prevent electric shocks or short circuits ✓
Rubber and plastic are insulators, so covering wires with them prevents current from escaping and protects people from shocks.