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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