Bn Ch 1 Quiz 2
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What is the name given to materials that do not let electricity move through them?
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Conductors
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Insulators
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Metals
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Plastics
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BN Ch 1 Quiz 2 explores key concepts in electricity, focusing on conductors and insulators. It assesses understanding of material properties affecting electrical conductivity, safety measures like insulation of wires, and practical examples of conductive materials.
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- 2.
Which of these pairs DO conduct electricity?
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Plastic and carbon
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Metal and rubber
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Metal and carbon
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Carbon and rubber
Correct Answer
A. Metal and carbonExplanation
Metal and carbon conduct electricity because they are both materials that have free electrons that can move freely within the material. In metals, the outer electrons of the atoms are not tightly bound to the nucleus, allowing them to move easily and carry electric charge. Carbon, in the form of graphite, also has free electrons due to its unique structure, which allows it to conduct electricity. Plastic and rubber, on the other hand, are insulators and do not have free electrons to carry electric charge.Rate this question:
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- 3.
Which of these is a good conductor?
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A plastic doll
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A wooden spoon
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A silver spoon
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A glass vase
Correct Answer
A. A silver spoonExplanation
A silver spoon is a good conductor of electricity because silver is a metal and metals are generally good conductors of electricity.Rate this question:
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- 4.
Why are electric wires often covered in plastic?
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To make the wires colorful
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So the wires are easy to see
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To keep the wires cool
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To insulate the wires
Correct Answer
A. To insulate the wiresExplanation
Electric wires are often covered in plastic to insulate them. Insulation is necessary to prevent the flow of electricity from the wires to surrounding objects or people, reducing the risk of electrical shocks or fires. Plastic is a good insulator because it does not conduct electricity. Additionally, plastic covering provides protection against moisture, dust, and other potential damages that could affect the wires' performance or safety.Rate this question:
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- 5.
Place a checkmark on ALL of these that will conduct electricity.
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Rubber
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Key
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Cd
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Wooden table
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Fork
Correct Answer(s)
A. Key
A. ForkExplanation
Rubber, cd, wooden table, and key cannot conduct electricity. However, a key and a fork are both made of metal, which is a good conductor of electricity. Therefore, the key and fork are the only items in the list that will conduct electricity.Rate this question:
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Current Version
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Mar 21, 2023Quiz Edited by
ProProfs Editorial Team -
Sep 25, 2012Quiz Created by
Bmsscience
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