The complete response is written as the sum of the forced and the natural response, and the initial conditions are then determined and applied to the complete response to find the values of the constants

In either case, leading or lagging, we say that sinusoids are out of phase () if phase angles equal they are said to be in phase(同相)

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

河海大学：《电机学》课程教学资源（PPT课件讲稿）绪论

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

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

一、物理表达式Tm=Crm2cos2 二、参数表达式T= 三、实用表达式Tm=2T

Example 1: If 0=4v2 cos\tV, Z=2/600Q2 Find p(t)and P. Solution:

sinusoidal voltage: V =V29 A sinusoidal current: I= We define the complex powerS=vi=V∠9,I∠-9 =V∠,-=V∠=+ jVI sin=P+j P=VIcos 9 --active(average) power

Let us now define resonance. In a two-terminal electrical network containing at least one inductor and one capacitor, resonance is the condition which exists when the input impedance of the network is purely resistive