《电路》（英文版）9-1 Instantaneous power

The phasor diagram is a name given to a sketch in the complex plane of the phasor voltages and currents throughout a specific circuit

8-2 Superposition, source transformation and Thevenin's theorem Superposition:

6.5 汽车空调系统的维修 6.6 汽车空调系统的故障诊断

邢台职业技术学院：汽车运用与维修专业《汽车电气设备原理与检修》课程教学资源（PPT课件讲稿）教学指南

8-1 Nodal, mesh and loop analysis Nodal analysis:

We define the ratio of the phasor voltage to the phasor current as impedance

《电路》（英文版）7-6 Phasor relationships for、and R:

sinusoidal current or voltage at a given frequency is characterized by only two parameters an amplitude and a phase angle. The complex representation of the voltage or current is also characterized by these same two parameters

The effective value of any periodic current is equal to the value of the direct current which flowing through a resistance R, delivers the same power to r as periodic current does