
Transient Response of Circuits Using Differential Equations 239
Therefore, the above equation can be rewritten as 160 31
()
di
or 480 12 0
di
or
di
=−
or
di
=− =−
480
40Α/s
6.3 TRANSIENT RESPONSE IN R–C SERIES CIRCUITS
HAVING DC EXCITATION
Consider an R–C series circuit, as shown in Figure 6.10.
Let us consider two cases, that is, when the capacitor is getting charged and when the capaci-
tor is getting discharged.
6.3.1 Case I: Capacitor is Getting Charged
When switch K is closed, the supply voltage V gets connected to the R–C series circuit at
t = 0. Let us assume that initially the capacitor is fully discharged. Therefore, at