Analysis of sinusoidal current circuits

1. Analysis of sinusoidal current circuits occurs under the condition that all elements of the circuit are ideal, i.e. R, L, C are perfect.
The electrical state of sinusoidal current circuits is described by the same laws as in DC circuits.

Ohm's law:



Kirchhoff's first law in trigonometric form:



Kirchhoff's first law in a complex form:



Kirchhoff's second law in trigonometric form:



Kirchhoff's second law in a complex form:



The algebraic sum of the complex voltages on the passive elements is equal to the sum of the external emfs included in this circuit. m is the number of contour plots. The rules of signs when drawing up equations are the same as in DC circuits.