capacitor impedance question ???

Status
Not open for further replies.
E

eng_ahmed_osama

Junior Member level 3
Joined
Feb 4, 2014
Messages
29
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Visit site
Activity points
220
why do we represent capacitor impedance by 1/jwcf , in practical what does this formula mean ??

And we get this formula ???
 

Actually my question related to practical application , what is this means in practical life
 

@eng_ahmed_osoma: impedance refers to the resistive property of the capacitor. at low frequencies it is very high and for high frequencies it is low.by using this property only we are defining rc filters
 

The impedance of a capacitor is inversely proportional to frequency as shown by the equation you referenced. We need that impedance value if we are to design the capacitor into electronic circuits to perform functions such as filtering, frequency shaping, and AC coupling of signals while blocking DC bias levels.

The formula can be derived from basic electrostatic derivations of capacitor operation. You can also measure the impedance versus frequency and see that it meets the derived equation.
 
Reactions: David_

    D

    David_

    Points: 2
    Helpful Answer Positive Rating
crutschow said:
The impedance of a capacitor is inversely proportional to frequency as shown by the equation you referenced.
Click to expand...

...and we shouldn`t overlook the fact that the term "impedance" involves also a phase shift. This is an important property that is exploited in many circuits (example: integrating circuits).
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…