web.ewu.eduweb.ewu.edu/.../claudio/ee209/f09/lectures/variables.pdf · · 2009-09-29note: this...
TRANSCRIPT
•
–
–
•
•
at all time outside the element : d B
dt0
at all time inside the element : dQenc
dt0
•
•
•
•
•
•
•
•
vijdw
dq
•
idq
dtq(t) = i(t)dt
t
•
•
i
•
•
•
•
pdw
dt
NOTE: this does not mean the power is negative. It depends on the numerical values of v and i
Example: v = -1 V, i = 1 A= -vi = 1W
•
•
–
–
•
–
–
•
•
iknode k
= 0
vijloop l
= 0
•
+–VBATTERY
•
+–VBATTERY
EL
• d l =d B
dtE
c
a
• d l + Ea
b
• d l + Eb
c
• d l = 0 Vac +Vba +Vcb = 0
•
+–VBATTERY
JS• dS =
dQenc
dtI ca + I ba + I da = 0