What Is the Capacitance of a Parallel-Plate Capacitor with Circular Plates?

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Homework Help Overview

The discussion revolves around calculating the capacitance of a parallel-plate capacitor with circular plates, specifically focusing on a capacitor with plates of 8.80 cm radius and 1.50 mm separation.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the formula for capacitance, with one noting the standard equation for a parallel-plate capacitor and questioning the relevance of other variables mentioned. There is also a focus on the parameters such as area, distance of separation, and constants involved in the calculations.

Discussion Status

The conversation includes attempts to clarify the formula and parameters needed for the calculation. Some participants express uncertainty about the correctness of the answer provided, while others suggest that the initial calculations may be on the right track.

Contextual Notes

There is mention of the need for the answer to be in picofarads (pF) and a reference to the constant for free space permittivity. Some participants indicate a lack of clarity regarding certain variables and their definitions.

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[SOLVED] Capacitors VERY QUICK EASY QUESTION! PLEASE HELP!

Homework Statement



A parallel-plate capacitor has circular plates of 8.80 cm radius and 1.50 mm separation.
(a) Calculate the capacitance.
 
Last edited:
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THE answer has to be in pF for part a)
 
I don't know what R is, and I don't know what L is. I can assume that A is the area, but the equation your teacher gave you makes no sense to me, as the equation for a parallel plate capacitor is:

[tex]C=\frac{k\epsilon _0A}{d}[/tex]

For air or free space, k is about 1.

There's also another equation:

[tex]C=\frac{Q}{V}[/tex]
 
Distance of separation.
Area.
Capacitance
Voltage
[tex]\epsilon_0=8.85\times10^-12 \frac{C^2}{Nm^2}[/tex]
Q = charge
 
1808
 
Last edited:
I can't say if the answer is right or wrong without you showing any work.
 
Looks right.
 

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