EXAM2-2008key

EXAM2-2008key - EXAM II INTRODUCTION TO MATERIALS SCIENCE -...

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EXAM II INTRODUCTION TO MATERIALS SCIENCE - MSE 150 SPRING 2008 HONOR CODE I PLEDGE MY HONOR THAT I HAVE NEITHER GIVEN OR RECEIVED AID ON THIS EXAMINATION. SIGNATURE _________________________________ PRINT NAME ________________________________ CAST YOUR VOTE TO DECIDE WHETHER THERE WILL BE A BONUS QUIZ ON WEDNESDAY, MARCH 26, 2008 YES ______ NO ______ DO NOT TURN THIS PAGE UNTIL 10:10 AM YOU HAVE 50 MINUTES TO COMPLETE THIS EXAM 1
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(1 point each) Circle the word that makes these sentences correct statements about materials properties. 1- Electrical resistivity is a materials property that depends upon bonding, microstructure, and temperature. 2- The electrical resistivity of an intrinsic semiconductor decreases with increasing temperature. 3- The electrical resistivity of a metallic conductor increases with increasing temperature. 4- Band theory describes an electrical insulator as having a full valence band, an empty conduction band, and a large band gap. 5- The change in the electrical conductivity of a metal with temperature is controlled by changes in carrier mobility . 6- The change in the electrical conductivity of an intrinsic semiconductor with temperature is controlled by changes in carrier density . 7- The electron mobility in intrinsic semiconductors is always greater than the hole mobility. 8- Adding a dielectric material between the plates of a parallel plate capacitor will increase the amount of energy that can be stored in the device. 9- Band theory describes an electrical semiconductor as having a full valence band, an empty
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This note was uploaded on 04/16/2008 for the course MSE 150 taught by Professor Wittig during the Spring '07 term at Vanderbilt.

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EXAM2-2008key - EXAM II INTRODUCTION TO MATERIALS SCIENCE -...

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