4 Conductivity of Select Materials Conductivity Material (1/(2 m)) Aluminum 3.77 x 107 Copper 5.95 x 107 Glass 1.00 x 10-12 Water 1.00 x 10-4 A cell phone company is trying to improve their chargers so that the battery charges faster. Based on the information above, which material would be the best to use when making the cell phone charger cable? F Aluminum G Copper H Glass Water

4 Conductivity of Select Materials Conductivity Material (1/(2 m)) Aluminum 3.77 x 107 Copper 5.95 x 107 Glass 1.00 x 10-12 Water 1.00 x 10-4 A cell phone company is trying to improve their chargers so that the battery charges faster. Based on the information above, which material would be the best to use when making the cell phone charger cable? F Aluminum G Copper H Glass Water

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 14CQ: The current I is measured through a sample of an ohmic material as a voltage V is applied, (a) What...

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The current I is measured through a sample of an ohmic material as a voltage V is applied, (a) What is the current when the voltage is doubled to 2V (assume the change in temperature of the material is negligible)? (b) What is the voltage applied is the current measured is 0.27 (assume the change in temperature of the material is negligible)? What will happen to the current if the material if the voltage remains constant, but the temperature of the material increases significantly?
In which of the three semiconducting materials listed in Table 20.1 do impurities supply free charges? (Hint: Examine the range of resistivity for each and determine whether the pure semiconductor has the higher or lower conductivity.)
Do impurities in semiconducting materials listed in Table 9.1 supply free charges? (Hint Examine the range of resistivity for each and determine whether die pure semiconductor has the higher or lower conductivity.)
How does the resistance for copper and for silicon change with temperature? Why are the behaviors of these two materials different?
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