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

[physicsbhelp]

[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.

 

[physicsbhelp]

THE answer has to be in pF for part a)

 

[Snazzy]

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:

$$C=\frac{k\epsilon _0A}{d}$$

For air or free space, k is about 1.

There's also another equation:

$$C=\frac{Q}{V}$$

 

[Snazzy]

Distance of separation.
Area.
Capacitance
Voltage
$$\epsilon_0=8.85\times10^-12 \frac{C^2}{Nm^2}$$
Q = charge

 

[physicsbhelp]

1808

 

[Snazzy]

I can't say if the answer is right or wrong without you showing any work.

 

[Snazzy]

Looks right.