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恒定电流是高考的重要考查知识点之一,涉及恒定电流的高考试题多是对基本概念和基本规律的考查,虽然不会很难,但也需要同学们认真审查题意,灵活运用所学知识,方能顺利解答.下面我们就一起来重点分析解答2012年高考中的电路问题,以期对同学们的学习有所帮助.一、电路中的电功和电能计算问题例11(浙江理综卷)功率为10 W的发光二极管(LED灯)的亮度与功率为60 W的白炽灯相当.根据国家节能战略,2016年前普通白炽灯应被淘汰.假设
Constant current is one of the important test knowledge of the college entrance examination, college entrance examination questions related to constant current are mostly basic concepts and basic rules of the test, although not difficult, but also need to carefully examine the questions, students use their knowledge , In order to successfully answer the following we will work together to analyze and answer the key problems in 2012 college entrance examination in order to help students learn. ) A 10-W light-emitting diode (LED) has the same brightness as an incandescent lamp with a power of 60 W. According to the national energy-saving strategy, ordinary incandescent bulbs should be eliminated by 2016. Assumptions