The cutoff (-3dB) frequency in Hertz of a simple RC filter is 1/(2\(\pi\)RC)do you find the cutoff frequency by trial and error? and what really is the difference between a high pass and low pass filter?
Assuming in all cases, you start your signal generator at 20Hz or less:it's as simple as calculating a formula? in the lab, we're hooking up simple LC and RC circuits and supposed to keep adjusting the function generator and oscilloscope trying to determine the cutoff. one of the instructors said we need to look for the resonant frequency, but one of the responses to my initial question was that there isn't a resonant frequency in an RC or LC circuit. also, i keep adjusting the time of the oscilloscope as i change frequency and i always can find a sine wave. how can i determine the cutoff by making adjustments on the equipment?
LC circuits can resonate: in practice, barring the use of superconductors any such circuit is really LCR, but providing that the R is not completely dominant there will still be evidence of resonance.it's as simple as calculating a formula? in the lab, we're hooking up simple LC and RC circuits and supposed to keep adjusting the function generator and oscilloscope trying to determine the cutoff. one of the instructors said we need to look for the resonant frequency, but one of the responses to my initial question was that there isn't a resonant frequency in an RC or LC circuit. also, i keep adjusting the time of the oscilloscope as i change frequency and i always can find a sine wave. how can i determine the cutoff by making adjustments on the equipment?
by Lianne Frith
by Jake Hertz