Which of the following assertions is NOT correcr? A The state of purity of a metal conductor determines to what extend it obeys Ohm's law whereas a thermistor cannot obey this law B The resistance of a pure metal varies linearly with its cross sectional area whereas that of a thermistor varies in an irregular manner with its area of cross section C Whereas all pure metals have positive temperature cnefficients of resistance, only. some thermistors have positive temperature coefficients of resistance.

Which of the following assertions is NOT correcr? A The state of purity of a metal conductor determines to what extend it obeys Ohm's law whereas a thermistor cannot obey this law B The resistance of a pure metal varies linearly with its cross sectional area whereas that of a thermistor varies in an irregular manner with its area of cross section C Whereas all pure metals have positive temperature cnefficients of resistance, only. some thermistors have positive temperature coefficients of resistance.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 9CQ: Do impurities in semiconducting materials listed in Table 9.1 supply free charges? (Hint Examine the...

See similar textbooks

Similar questions

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.)
Check Your Understanding What conditions are necessary for superconductivity?
Germanium is a semiconducting metal with a resistivity of 0.460 m. (a) Determine the current per unit area through a 5.00-V germanium junction with a length of 2.00 mm. (b) Find the current through the junction if its cross-sectional area is 2.00 105 m2.
How does temperature affect resistance? Can thermal expansion explain the non-ohmic behavior, why? What happens at the atomic level that accounts for the non-ohmic property?
Does a photovoltaic cell obey Ohm’s Law? Explain briefly
Germanium is a semiconducting metal with a resistivity of0.460 Ω . m. (a) Determine the current per unit area througha 5.00 - V germanium junction with a length of 2.00 mm.(b) Find the current through the junction if its cross - sectionalarea is 2.00 x 10-5 m2.
a) Copper has a mass density of 8.95g/cm3 and in electrical resistivity of 1.55× 10−8ohm-m at room temperature. Assuming the effective mass is “mo”. Calculate. 1) The concentration of the conduction electrons. 2) Electrical conductivity
A current of 1.5 x 103 A passes through an electrolytic cell for 6 mins. How many moles of electrons are driven through the cell? (provide the given and required to find in the problem) (Kindly provide a CLEAR and COMPLETE solution) (Answer should be typewritten)
At 20.0°C, the carbon resistor in an electric circuit connectedto a 5.0 - V battery has a resistance of 2.0 x 102 Ω. What is thecurrent in the circuit when the temperature of the carbonrises to 80.0°C?
Two new materials have been discovered. One is shinyand has a metallic look, while the other is dull andhas a non-metallic look. Although you think that oneis a conductor and the other an insulator, you wantto be certain. Describe a test you could do to test theconductivity of these two materials.
Metals are bonded by metallic bond, that is protons in a sea of electrons which give them their characteristic conductivity. If the electric current flows from one end to the other end using a copper wire to bridge the gap, the extra electron given through the electric current will cause the sea of electrons in the copper to? A. The electrons given will just be deposited in the sea of electrons with nowhere to go B. The electrons given will occupy the space of the electrons that were pushed. C. The electrons given will not flow to the metal because of repulsion. D. The electrons given will travel to the other end through the proton movement.
For ohmic materials,what is the relationship between resistance and temperature?