一道SAT2物理真题及其解法解析

 　　SAT考试不仅考察考生的学术水平、学术能力与学术素质，同时还检测考生的学术态度。考生在参加SAT考试时，答错题目要扣分。下面新航道小编为大家具体介绍一道SAT2物理真题及其解法解析，希望对大家有所帮助。

　　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。

　　The  set of lettered choices below refers 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 currentand  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.

　　以上便是一道SAT2物理真题及其解法解析的相关介绍，非常详细，希望对大家有所帮助。想要了解更多关于SAT考试的信息，请多多关注新航道官网，更多关于SAT2物理真题的内容为您分享。