In the series LCR circuit, the plot of Imaxversusω is shown in the figure. Find the bandwidth and mark in the figure.

                                        

Hint: The bandwidth depends on the frequencies corresponding to 12 times value of the maximum current.
Step 1: Consider the diagram.
Bandwidth = ω2-ω1
Where ω1andω2 corresponds to frequencies at which magnitude of the current is 12 times of maximum value.
Step 2: Irms=Imax2=120.7A
Clearly from the diagram, the corresponding frequencies are 0.8 rad/s an 1.2 rad /s.
ω=Bandwidth=1.2-0.8=0.4rad/s