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电学中电路问题,涉及电流、电压、电阻、电功(率)和欧姆定律(I=U/R)和焦耳定律(Q=I2RT)等知识的应用。在电路问题中容易引起困惑的是“短路”、“多电路”“滑变”以及“含电路的电学计算”等问题。要走出这些困惑的“电路”,首先应理解掌握上述电学基本概念和定律,能识别串联电路、并联电路以及(A)和(V)所测的用电器的对应关系(即理解串联电路、并联电路各自的三个特点),再适当强化识别电路的练习以及有关电学计算.再从下面例题中领会一些解题方法,以提高能力.
Electrical circuit problems involve the application of knowledge of current, voltage, resistance, electrical work (rate) and Ohm’s law (I=U/R) and Joule’s law (Q=I2RT). Problems that are easily confused in circuit problems are “short circuit,” “multi-circuit,” “slip,” and “electric calculations with circuits.” To get out of these confusing “circuits”, first of all, we must understand the above-mentioned basic concepts and laws of electricity, and identify the series circuits, parallel circuits, and the correspondence between the electrical appliances measured in (A) and (V) (ie, understanding series circuits and parallel connections. Each of the three characteristics of the circuit), and then strengthen the recognition circuit exercises and related electrical calculations. From the following examples to comprehend some problem-solving methods to improve the ability.