Because Sin[ωt] is in,beg guide or Sin[ωt±90°] can appear after integral, went up to receiving so the inductance of sine wave, capacitance, when the abscissa is ωt, can observe the phenomenon of undee lead lag, see not quite easy understanding from function graph of the static state directly, still be make it animation has been compared.

 

Next graphs are inductance, show tension with red, blue expresses electric current. If receive,go up ammeter of ideal volts d.c. watch, dc, can observe the metabolic lead of voltage at electric current, metabolic lag of electric current at voltage. When time increases, ordinate axis and time origin can be gone to together as weaveform left shift.

 

 

If draw weaveform in vectorgraph right, namely below this kind of animation, but the abscissa is right the weaveform that is past existence, point to the past, be – ωt. Although undee conversely, but the change of voltage still lead at electric current, voltaic change still lag at voltage. Time origin is gone to as weaveform all the time right shift, the ordinate axis that function pursues medium was not handed in at origin with the abscissa, the time that nodical place represents is increasing all the time. If carelessly, the judgement of lead lag makes mistake very easily.

 

 

It is best that this one concept uses understanding lead lag to estimate a figure, from measure data to observe or make mistake not quite intuitionistic and easily from the observation on static weaveform. Next graphs are capacitance. The metabolic lag of voltage at electric current, metabolic lead of electric current at voltage. Coordinate is right it is future, zun Fang was in the past.

 

 

The abscissa is – when ωt, the change of the voltage of capacitance still lag at electric current, voltaic change still lead at voltage. Because this coordinate is left,just be future, and right was in the past.

 

 

Next graphs are resistor. Function of voltage function electric current is inphase.

 

 

Next graphs are 3 person the circumstance of series connection, the photograph that do not have a picture estimates graph and undee figure. But can judge from the change of pressing with a finger: When electric current is identical, the voltage function of inductance and capacitance is turned over.

 

Did not draw total voltage, because total voltage is possible lead at total electric current, possible also lag at total electric current, possible also both and inphase, inphase when for syntonic condition.

 

 

Still had done this kind before, of component right mark is the referenced direction of voltage electric current. Describe the volume of voltage with different color, blue > yellow > gules; Describe voltaic size and way with different degree of finish and arrowhead, and fill inductance, electric capacity can the effect also is done, magnetic field of the inductance when electric current is the biggest can be the biggest, capacitance electric field can be the smallest.

 

But, if with respect to explanatory lead lag this entirely reads aloud, the animation that pressing with a finger expresses is more intuitionistic.