الفيزياء العامة الجزء الثاني#موقع الفيزياء.كوم

Lectures in General Physics
I
dq
dt
Q
RC
−t
RC
= = − e
(8.21)
The -ve sign indicates that the direction of the current in the discharging
process is in the opposite direction of the charging process.
The quantity Q/RC is equal to the initial current I o (i.e. when t=0)
I
−t
RC
= I o
e
(8.22)
I (A)
q
t (sec)
Q
I o
I o
=
Q
RC
t (sec)
Figure 8.20
Plots of the charge Q and the current I as a function of
time in the discharging process
In the end we found that charging and discharging process of the
capacitor is exponentially depends on the time constant (RC).
Dr. Hazem Falah Sakeek