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一道SAT2物理真题及其解法.

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  下面是一道SAT2物理真题及其解法的相关信息,非常实用。SAT2物理真题对于大家备考SAT2物理考试是最好的备考材料,因为从中我们可以在更短的时间内明白SAT2物理考试的出题方向,便于大家更快更好的答题。

  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.

  Which graph represents the total heat developed from time

  by a resistor carrying a steady current?

  Answer Choices

  (A)

  (B)

  (C)

  (D)

  (E)

  The correct answer is A

  Explanation

  Difficulty: Easy

  The correct answer is a steadily increasing amount. The rate of heat dissipation by a resistor is equal to the power it expends. The power is related to the current and the resistance by the equation , so if the current is constant the power is constant. The total heat developed is then the power multiplied by the total time .

  The graph is thus a steadily increasing function of time.

  以上就是这道SAT2物理真题的详细内容,后面附有相应的答案。这道SAT2物理真题相对比较简单,但是涉及到的物理知识却是比较关键的。SAT2物理是中国的考生在选择SAT2考试科目的时候最喜欢的一个,所以大家一定要练习更多的真题,以便更好的应对。

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