9. A spherical shell of radius R, carrying a uniform surface charge o, is set spinning
at angular velocity .
(A) The vector potential for r≤R
(B) The vector potential for r≤R
(C) The vector potential for r≤R
(D) The magnetic field for r≤R

(E) The magnetic field for r≤R

複選題5. An uncharged metal sphere of radius R is placed in an otherwise uniform electric filed . The field will push positive charge to the northern (i.e., z＞ 0) surface of the sphere, leaving a negative charge on the southern surface. (A) The potential at r→∞ is 0. (B) The potential when r ＞＞ R (the radius of the sphere) is -E0rcosθ. (C) The potential inside the sphere is E0rcosθ. (D) The potential on the surface of the sphere is E0Rcosθ. (E) The induced charge density is -3E0E0cosθ.

6. Given that dipole moment and polarization . (A) (B)(C) (D) (E)

複選題7. Which are correct with the Poynting vector ? (A) is the energy per unit area and per unit time, transported by the electromagnetic fields. (B) is the electromagnetic force per unit area acting on a surface. (C) /c2 is the momentum current density transported by the fields. (D) /c2 is the momentum per unit volume stored in the electromagnetic fields. (E) /c2 is the work done on the charges by the electromagnetic force.

複選題8. Assume the wave guide is a perfect conductor, so that the boundary conditionsㆍ Given the general form determine which expressions are true?(A)(B) (C) (D)(E)

10. Suppose a normal incidence occurred between tow linear media (n1 →＞ n2)(A) The reflection coefficient (B) The reflection coefficient (C) The reflection coefficient (D) The transmission coefficient (E) The transmission coefficient

1. 簽發票據清償對供應商之欠款會導致資產減少、權益減少。(A)O(B)X

2. 一筆調整分錄一定會同時影響資產負債表項目及綜合損益表項目。(A)O(B)X

3. 在物價上漲時，期末存貨採用先進先出法評價是最能接近目前的市價。(A)O(B)X

4. 應收帳款之呆帳採用備抵法處理時，沖銷呆帳會造成應收帳款淨變現價值 減少。(A)O(B)X

5. 若不動產、廠房及設備採用重估價模式，當公允價值大於帳面金額時，其 差額應認列為當期利得。(A)O(B)X