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一道SAT2物理真题及其解法解析.

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  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。下面澳际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 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 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,请拨打免费留学培训热线:400-601-0022,或者直接点击网页上的“在线咨询”,与我们的澳际培训专家一对一沟通交流!

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