This
frequency is called the resonant frequency:
0
0
1
or
c
L
X
X
L
C
ω
ω
=
=
or   
0
1
LC
ω
=
(7 28)
At resonant frequency, the current amplitude
is maximum; im = vm/R Figure 7 16 shows the variation of im with w
in a RLC series circuit with L = 1