90年 - 90 淡江大學轉學考電磁學#56130

科目：研究所、轉學考(插大)◆電磁學 | 年份：90年 | 選擇題數：0 | 申論題數：9

試卷資訊

所屬科目：研究所、轉學考(插大)◆電磁學

選擇題 (0)

申論題 (9)

(a) Find the electric field at a point p along its axis at a distance d from one end as shown in Fig. 1. (15 %)

(b) At large distances from the rod (that is, where d>>L)， what is the field of the rod? Give some discussion on your results. (5%)

(a) Find the potential at a distance z above the center of the charge distributions. (15%)

(b) Use the result from (a) to find the electric field at p. (10%)

(a) Find the flux of B through the loop. (15 %)

(b) If someone now pulls the loop directly away from the wire, at speed v，what electromotive force is generated? In what direction does the current flow? (12 %)

(c) What if the loop is pulled to the right at speed v，instead of away? (Give the reasons for your answer.) (3 %)

(a) What is the resultant magnetic field at the center? (20 %)

(b) Find the magnetic moment of the loop? (5 %)