26.1 (R-C) and (L-R) D.C. circuits

Thus the capacitor gets charged exponentially to the maximum charge q₀ = EC.
Now, from (2)

Thus the current decays exponentially. The action of the capacitor therefore can be regarded as a "close circuit" at t = 0 and then gradually to an "open circuit" as t . This is also clear from a P.D. across R and C.

Inductance Resistance (L-R) circuit

The inductance will oppose the growth of current. Initially therefore i = 0 at t = 0 [comparing (b) with (1)

The current grows exponentially to a maximum from zero current initially. Thus an inductance action can be considered to be "open circuit" at t = 0 and then gradually a "close circuit" as t

[next page]

Index

26.1 R-C and L-R D.C Circuits
26.2 Reactance and impedance of L,C,R

Chapter 27