(2) How would you expect the resistivity of a good insulator such as glass or polystyrene to vary with temperature?

Inquiry into Physics
8th Edition
ISBN:9781337515863
Author:Ostdiek
Publisher:Ostdiek
Chapter7: Electricity
Section: Chapter Questions
Problem 17Q: (Indicates a review question, which means it requires only a basic understanding of the material to...
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Activity 2: Qualitative Problems
Direction: Answer the following questions.
(1) Good thermal conductors are said to be good electrical conductors. If so,
why is it that cords used to connect toasters, irons, and heat-producing
appliances get hot by the conduction of heat from the heating element?
(2) How would you expect the resistivity of a good insulator such as glass or
polystyrene to vary with temperature?
(3) A fuse is a device that is designed to break the circuit. It melts when the
current exceeds its value. What characteristics should the material have?
Transcribed Image Text:What's More Activity 2: Qualitative Problems Direction: Answer the following questions. (1) Good thermal conductors are said to be good electrical conductors. If so, why is it that cords used to connect toasters, irons, and heat-producing appliances get hot by the conduction of heat from the heating element? (2) How would you expect the resistivity of a good insulator such as glass or polystyrene to vary with temperature? (3) A fuse is a device that is designed to break the circuit. It melts when the current exceeds its value. What characteristics should the material have?
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