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Conductors and Insulators — Free MYP3 Sciences Practice Questions
1QuestionTesting Materials for ConductivityConcept Practice
2 marks~3 minCriterion B
The diagram shows a simple circuit with a battery, a bulb, and a gap where a material can be inserted.
Explain the procedure you would follow to determine whether a paperclip conducts electricity using this circuit. [2]
Explain the procedure you would follow to determine whether a paperclip conducts electricity using this circuit. [2]
Solutions
2QuestionElectrical Safety and InsulationAssessment Practice
4 marks~6 minCriterion D
A person stands on a rubber mat and holds a wooden ladder while replacing a lightbulb connected to mains electricity. The person does not receive an electric shock.
a
Identify the type of electrical material that both wood and rubber are. [1]
b
Explain what this type of material does to electric current. [1]
c
A second person suggests replacing the rubber mat with a thin plastic sheet and the wooden ladder with a metal one. Analyse how these changes would affect the electrical safety of the person replacing the lightbulb. [2]
Solutions
3QuestionElectrical Safety and InsulationConcept Practice
2 marks~3 minCriterion A
Electrical wires in homes are coated with a layer of plastic insulation.
a
Identify the specific type of plastic commonly used to insulate household electrical wires. [1]
b
Explain one consequence that could occur if this insulation became damaged. [1]
Solutions
4QuestionTesting Materials for ConductivityAssessment Practice
4 marks~6 minCriterion C
A student builds a simple circuit with a battery, a bulb, and a gap. When a metal paperclip is placed in the gap, the bulb lights up. When a plastic straw is placed in the gap, the bulb does not light up.
a
Identify whether the metal paperclip and the plastic straw are conductors or insulators. [1]
b
Explain why the metal paperclip allows electric current to flow through it. In your answer, refer to free electrons. [2]
c
A student claims: "The plastic straw stops the current because it absorbs the electrons." Using your knowledge of atomic structure, explain why this claim is incorrect. [1]
Solutions
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