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I was in the lab doing the experiment of resonance frequency by plotting the graph of current vs frequency for a parallel RLC circuit. In this experiment i have also to find the Q factor and the bandwidth. The resonance frequency corresponds to the frequency with minimum intensity. Now question is when i am trying to find the half power frequencies using the relations I=0.707I_{max}, the parallel line crossing that intensity does not cross the curve so how do i have to find those half power frequencies?