The resistance of a conducting material depends on its composition, length, diameter, and temperature
Indicate whether the statement is true or false
T
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A _________composite is one that produces no shear strains when stressed in tension.
Fill in the blank(s) with the appropriate word(s).
If an electric field is applied to a metal
a. very few electrons are excited into the conduction band. b. electrons having energies near the Fermi energy require only a small amount of additional energy from the applied field to reach nearby empty energy states. c. electrons having energies near the bottom of the band require only a small amount of additional energy from the applied field to reach nearby empty energy states. d. the principal mode of conduction is through the motion of holes in the filled part of the band. e. the Fermi energy Ef becomes equal to the applied electric field E.
The mass of matter is due mostly to its
1) protons 2) electrons while the volume of matter is due mostly to its 3) protons. 4) electrons. 5) none of these
A +5.0-µC point charge is 12 cm from a -5.0-µC point charge. What is the magnitude of the field they produce at the point on the line connecting them where their electric potential (relative to infinity) is zero?
(k = 1/4??0 = 9.0 × 109 N ? m2/C2 ) A) 0 N/C B) 12.5 MN/C C) 0.75 MN/C D) 25 MN/C E) 1.5 MN/C