2018年AP电磁学（选择题+简答题）真题及答案高清无水印PDF下载

2018年AP电磁学（选择题+简答题）真题及答案高清无水印PDF下载

以下为2018年AP电磁学选择题真题内容：

1-2题：The figure above shows a thin, square, nonconducting sheet of positive charge uniformly distributed over its area. The length of each side of the sheet is a. Point C is at the center of the sheet. Point X is a distance d above the center of the sheet,and point Y is a distance 2d above the center of the sheet. Assume a>>d. The effect of gravity is negligible.

1.If the magnitude of the electric field at point X is E, what is the magnitude of the electric fieldat point Y?

(A)E/4

(B)E/2

(C)E

(D)2E

(E)4E

2.A positive point charge +q is released from rest at point X. If the magnitude of the electric fieldat point X is E, what is the kinetic energy of thecharge at point Y?

(A)qEd

.......余下真题省略！

以下为2018年AP电磁学简答题真题内容：

1. A circuit is created with an ideal battery and five resistors with the values shown in the figure above. An open switch is shown that can connect points X and Y. A voltmeter V and an ammeter A1 are also shown in the figure.

(a) The switch is in the open position.

• .Calculate the current measured by the ammeter A1
• .Calculate the potential difference measured by the voltmeter V.

(b) The switch is now moved to the closed position.

• Calculate the current measured by the ammeter A1
• Calculate the potential difference measured by the voltmeter V.

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