課程名稱︰普通物理學甲
課程性質︰必修
課程教師︰陳政維
開課系所︰物理系
考試時間︰06/23/2006
是否需發放獎勵金：是 謝謝
（如未明確表示，則不予發放）
試題 :
1.(a)Find the rest energy of a proton in electron volts.
(b)If the total energy of a proton is three times its rest energy,what
is the speed of the proton?
2.Aclock moves along an x axis at a speed of 6.00c and reads zero as it
passes the origin.
(a)Calculate the clock's Lorentz factor.
(b)What times does the clock read as it passes x=180m?
(haliday 習題37-21)
3.The speed of an electron is measured to be 5000 m/s,to an accuracy of
0.00300%. Find the minimum uncertainty in determining the position of
this electron.
4.Singly charged sodium ions are accelerated through a potential differ
ence of 300V.
(a)What is the momentum acquired by such an ion?
(b)What is its de Broglie wavelength(M=22.9898 g/mole)?
(haliday 習題38-45)
5.A 30-eV electron is incident on a square well of height 40 eV.What is
the probability yhat the electron will tunnel the barrier if its barr
ier width is 0.10nm?
6.An electron is confined to a one-dimensional, infinitely deep potential
energy of width L-0.10nm.
(a)What is the smallest amount of energy the electron can have?
(b)If the electron gains energy for the jump from energy level E1 to
energy E3,what light wave-length is required?
7.Five electrons are confined to the rectangular corral with widths Lx=L
and Ly=2L.
(a)What is the total energy of the five-electron system in its ground
state, as a multiple of h^2/8mL^2?
(b)How much energy must be transferred to the system for it to jump to
its first excited state?
8.The fermi energy for silver is 5.5eV. At T=300k, What is the probability
that a quantum state whose energy is 5.6eV will be occupied?
9.A sample of yhe isotope 131I,which has a half-life of 8.04 days,has an
activity of 5mCi at the time of shipment. Upon receipt in a medical labo
ratory, the activity is 4.2mCi. How much tine has elasped between the
two measurements?
10.Please explain:(a)the photoelectric effect and(b)n-type semiconductor
electron's m=9.11*10^-31kg; proton's m=1.67*10^-27kg
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◆ From: 220.135.124.246
※ 編輯: leehoni 來自: 220.135.124.246 (06/23 15:21)
※ 編輯: leehoni 來自: 220.135.124.246 (06/23 15:23)