- #1

rockerman

- 14

- 0

## Homework Statement

Hello everyone!

I'm writing a lab report about capacitance of a capacitor of mobile parallel plates. The experiment guide says to measure the capacitance when the distance tends to infinity. This is the residual capacitance, which in my measurings result in 5pF.

Ok... the area of the plates is 7.85 x 10^-3... and I'm using the C = A* epsilon_0/d formula to estimate the capacitance

below the Measured data and the theoretical one:

measured: (distance(mm) ; capacitance (pF))

1:85 2:40 3:29 4:23 5:20 6:17 7:15 8:14 9:13.5 10:13

calculated (distance(mm): capacitance(pF))

1:69.42 2:34.713 3:23.1423 4:17.3568 5:13.8854 6:11.5712 7: 9.9181 8:8.6784 9:7.7141 10:6.9427

Is this mere coincidence that the values differ in majority by about 5pF?

my doubt is if this residual capacitance will not be included in the theoretical model?

thanx...