Register to reply

Capacitance

by Monsu
Tags: capacitance
Share this thread:
Monsu
#1
Oct13-04, 12:08 AM
P: 39
You are given a low pass filter of 50nF and a resistor of 100 KOhm.
a) Draw the circuit diagram;
b) Calculate the 3dB frequency;
c) Calculate the impedance of the series circuit of R and C and draw it in the complex plane at
about 2 decades around the 3dB point and at the 3dB point.
d) Draw the circuit diagram for a high pass filter with same components.



I am asked to calculate the 3db freq, right? is this the right formula f = 1 / (2piRC) ?
and afterwards calc the impedance z = R + jXc where Xc = 1 / (2pifC) ?
and then getting the decades, say our freq was 31.8Hz , 2 decades below would b 0.318? 2 decades above would b 3180?
then we should use those values of f to determine the Xc at those frequencies, and then find z at each of these frequencies?
then we plot a graph showing all the z's?


pls smne help me coz i'm totally confused!!!
thanks in advance!
Phys.Org News Partner Science news on Phys.org
Wildfires and other burns play bigger role in climate change, professor finds
SR Labs research to expose BadUSB next week in Vegas
New study advances 'DNA revolution,' tells butterflies' evolutionary history

Register to reply

Related Discussions
How to find total capacitance Introductory Physics Homework 6
Capacitance Introductory Physics Homework 6
Capacitance Introductory Physics Homework 0
What is the capacitance of this device? Advanced Physics Homework 2
Capacitance help Introductory Physics Homework 2