On the left is a band pass filter, and increasing the resistance of the resistor makes the filter wider while decreasing the resistor make the filter sharper. On the right is a notch filter. Increasing the resistor makes it sharper, while decreasing the resistor makes it wider. The 1uOhm resistor is just so that the AC simulation doesn’t stop after reaching the critical frequency of the notch filter. To better see the band-pass filter’s frequency response, you should get rid of the green line. The equation for the value of the damping resistor is √(L/C)* with L in Henries, C in Farads, and the result in ohms.
*Credit to @2ctiby for the sqrt symbol.
