I've been doing work for an exam that's coming up and actually happen to have lost my notes 2 days before the exam, now i'm in a state of panic and know i won't do well, but i need to pass at least, so i've asked for some practice questions but i don't have much of an idea on how to do them. Any help is appreciated,

Find the resonant frequency of the graphs : http://prntscr.com/ax7dzc

Edit: On the left axis is the current, on the x axis, is the frequency

By looking at the graphs, i guess

I Supply series, 65Hz

I Supply parallel, 1Hz

Define the term resonant frequency - Resonant frequency is the point at which the impedence of the circuit is at it's lowest or highest point (Lowest point for a series circuit and highest point for a parallel circuit)

For each circuit define how the current of the circuit changes at the resonant frequency *And also the impedence* - For the series circuit, the current of the circuit peaks, and from this point onwards will begin to decrease as it has the lowest impedence at this point, which is visible by looking at the graph

For the parallel circuit, the impedence is increasing, and once it reaches this resonant frequency, the impedance is at it's highest point and thus cannot go higher, this means that after the resonant frequency point, the current will begin to decrease as the impedance will be getting lower, resulting in less current.

There are other questions which are longer and am struggling on, but i don't think there's enough time left so i'll have to fail them, please let me know if the above is correct, thanks