兩道SAT2物理題及答案.

　　下面是兩道SAT2物理題及問題的答案。SAT2物理考試相對于其他的SAT2考試科目而言是比較簡單的，所以大家在備考SAT2物理考試的過程中，一定要更加關(guān)注方法的積累，這樣才能更加有效率的解答關(guān)于SAT2物理方面的題目。

　　The set of lettered choices below rers to multiple questions. Select the one lettered choice that best answers each question. A choice may be used once, more than once, or not at all in each set.

　　This question relates to a point charge fixed in position, as shown in the diagram. Five points near the charge and in the plane of the page are shown.

　　At which point will the magnitude of the electric field be least?

　　Answer Choices

　　(A) Point A

　　(B) Point B

　　(C) Point C

　　(D) Point D

　　(E) Point E

　　The correct answer is D

　　Explanation

　　Difficulty: Easy

　　The correct answer is point D because it is farthest away from the point charge. The magnitude of the electric field E at any location due to a point charge is inversely proportional to the square of the distance r from the location to the charge,, so the greater the distance, the less the magnitude of the electric field.

　　This question relates to a point charge + Q fixed in position, as shown in the diagram. Five points near the charge and in the plane of the page are shown.

　　At which point will an electron experience a force directed toward the top of the page?

　　Answer Choices

　　(A) A

　　(B) B

　　(C) C

　　(D) D

　　(E) E

　　The correct answer is E

　　Explanation

　　Difficulty: Easy

　　The correct answer is point E, which is directly below the point charge + Q. The electron is negatively charged and since unlike charges attract, it will always experience a force directed straight toward the charge + Q, which is fixed in position. The only labeled point where a force toward + Q is directed toward the top of the page is point E.

　　以上就是這兩道SAT2物理題的全部內(nèi)容，是關(guān)于一幅圖的兩道題目，后面附有答案解析和問題的難度。SAT2物理題和大家平時解答的物理題目有所不同，所以需要大家不斷的練習(xí)才能在詞匯和方法方面都熟悉掌握。

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