The Fermi energy corresponds to
a. the maximum energy electrons can have in a metal at T = 0 K.
b. the maximum energy electrons can have in a metal at T = 0 C.
c. the minimum energy electrons can have in a metal at T = 0 K.
d. the number of electrons per unit volume between E and E + dE.
e. the minimum energy electrons can have in a metal at T = 0 C.
a
You might also like to view...
Suppose that the speed of an electron traveling 1.0 km/s is known to an accuracy of 1 part in 105 (i.e., within 0.01%). What is the greatest possible accuracy within which we can determine the position of this electron?
What will be an ideal response?
A parallel plate capacitor is connected to a battery and charged to voltage V. Leah says that the charge on the plates will decrease if the distance between the plates is increased while they are still connected to the battery. Gertie says that the charge will remain the same. Which one, if either, is correct, and why?
a. Gertie, because the maximum voltage is determined by the battery. b. Gertie, because the capacitance of the capacitor does not change. c. Leah, because the capacitance decreases when the plate separation is increased. d. Leah, because the capacitance increases when the plate separation is increased. e. Neither, because the charge increases when the plate separation is increased.
In this diagram a force acting on a block is shown by the arrow labeled F. The mass of the block is known, as is the size of the force, but the observed acceleration is larger than F/m and so another force must act on the block. In which direction (A, B, C, or D) is this force?
A. A B. B C. C D. D
Which of the following is not one of the ways sound can be used?
a. to circulate the refrigerant in a refrigerator b. to relay information to orbiting satellites c. to form images of internal organs d. to measure the air temperature aloft e. to make a bubble in water produce light