I would like to measure experimentally the resonance frequency of an LC network. The L is 1mH with 0.3Ω losses and the C is 10μF, having resonance at around 1.5-1.6 kHz.
What I have done so far is the following:
(1) I provide a sinus from a function generator to the LC network
(2) Keeping constant the amplitude, I vary the frequency of the input sinus
(3) I then measure the voltage drop across the L (or the C) with an oscilloscope
or
(4) Alternatively I measure the current through the L (or the C) by using a multimeter.
However I cannot see neither the voltage nor the current increasing too much. Actually the voltage doesn't seem to have any difference (probably due to insufficient resolution of the oscilloscope??). The current is increased but by a really really small amount (some micro-amps).
Do I make some silly mistake that I cannot think of right now? I was thinking that maybe the function generator's output resistance (50Ω) is not proper for my experiment. Should I intervene some buffer between the generator and the circuit?
What I have done so far is the following:
(1) I provide a sinus from a function generator to the LC network
(2) Keeping constant the amplitude, I vary the frequency of the input sinus
(3) I then measure the voltage drop across the L (or the C) with an oscilloscope
or
(4) Alternatively I measure the current through the L (or the C) by using a multimeter.
However I cannot see neither the voltage nor the current increasing too much. Actually the voltage doesn't seem to have any difference (probably due to insufficient resolution of the oscilloscope??). The current is increased but by a really really small amount (some micro-amps).
Do I make some silly mistake that I cannot think of right now? I was thinking that maybe the function generator's output resistance (50Ω) is not proper for my experiment. Should I intervene some buffer between the generator and the circuit?