Relation between capacitance and frequrency

In summary, capacitance is the ability of a material or system to store electric charge, measured in farads (F) and represented by the letter C in equations. It has an inverse relationship with frequency, as shown by the equation C=1/(2πf), where f is the frequency in hertz. The type of material used for the capacitor can affect this relationship, with some materials having a more stable capacitance over a wide range of frequencies. The size of the capacitor does not directly affect the relationship, but smaller capacitors may have higher parasitic inductance and resistance, limiting their ability to handle high frequencies. There is also a limit to the frequency at which capacitance becomes irrelevant, known as the self-reson
  • #1
diya234
1
0
what is the relatiob between capacitance and frequency?.. Can anyone please me in simple words..couse i m confused about it, in some sites they says its proportional..and other says inverse...:(
 
Physics news on Phys.org
  • #2
When a circuit contains both inductors and capacitors the resonant frequency is 1/2pi(square root indutance [henrys] times capacitance [Farads]).
 

What is capacitance?

Capacitance is the ability of a material or system to store an electric charge. It is measured in farads (F) and is represented by the letter C in equations.

How is capacitance related to frequency?

Capacitance and frequency have an inverse relationship, meaning that as the frequency increases, the capacitance decreases. This can be represented by the equation C=1/(2πf), where f is the frequency in hertz.

Does the type of material affect the capacitance-frequency relationship?

Yes, the type of material used for the capacitor can affect the capacitance-frequency relationship. Certain materials, such as ceramic and film, have a more stable capacitance over a wide range of frequencies compared to others, like electrolytic capacitors.

How does the size of the capacitor affect the capacitance-frequency relationship?

The size of the capacitor does not directly affect the capacitance-frequency relationship. However, the physical size of the capacitor can affect its ability to handle high frequencies, as smaller capacitors may have higher parasitic inductance and resistance.

Is there a limit to the frequency at which capacitance becomes irrelevant?

Yes, there is a limit to the frequency at which capacitance becomes irrelevant. This is known as the self-resonant frequency (SRF) and is determined by the parasitic inductance and capacitance of the capacitor. Above the SRF, the capacitor will start to behave as an inductor.

Similar threads

Replies
3
Views
893
Replies
5
Views
1K
  • Electromagnetism
Replies
1
Views
1K
Replies
7
Views
1K
Replies
1
Views
2K
Replies
10
Views
2K
  • Electromagnetism
Replies
10
Views
1K
Replies
7
Views
1K
Replies
2
Views
2K
  • Electromagnetism
Replies
5
Views
1K
Back
Top