Transcript process of charging and discharging in a capacitor

 Explain
the process of charging and
discharging based on the voltage and current
curves.
 Determine the related equations for the
voltage and current curves
 Formulate the instantaneous voltage /
current equation.
 Determine the time constant, = CR
 Determine the energy stored in a capacitor.
 Solve problems on capacitors
t = 5
a. Time constant ,  = CR
b. Initial Charging current
I max = V/R
c. Charging voltage of capacitor,
Vc = Vmax (1 – e -t/ )
d. Charging current
i = Imax (e -t/ )
e. Initial rate of change potential
difference
dVc = V / CR
dt
f. Time when capacitor fully charge

t=5
g. Energy stored, E = ½ CVmax2
a. Time constant ,  = CR
b. Initial disharging current
I max = V/R
c. Disharging voltage of
capacitor,Vc = Vmax ( e
d. Discharging current
i = - Imax (e -t/ )
-t/
)
e. Initial rate of change
potential difference
dVc = V / CR
dt
f. Time when capacitor decrease
charge
t=5
