Register to reply

Capacitance of loops

by csopi
Tags: capacitance, loops
Share this thread:
Feb3-13, 06:32 PM
P: 79

Does anybody know a nice formula for the capacitance of two metallic wire loops with equal radius R?

(The center of the loops are above each other, their distance is d. The whole system is in vacuum)

Thank you!
Phys.Org News Partner Physics news on
Symphony of nanoplasmonic and optical resonators produces laser-like light emission
Do we live in a 2-D hologram? New Fermilab experiment will test the nature of the universe
Duality principle is 'safe and sound': Researchers clear up apparent violation of wave-particle duality
Feb3-13, 11:51 PM
P: 588
There will not be a nice formula for that.

If you just need the capacitance value of a specific geometry you can use the free field solver at
Feb4-13, 06:28 AM
P: 3,143
Can you assume the radius R is >> d ?? In which case isn't this just the same as two parallel wires?

Feb4-13, 06:46 AM
P: 79
Capacitance of loops

CWatters: yes, in that case it would be just two parallel wires. However I was looking for a general formula, that works when R ~ d as well. Actually, I'm trying to estimate the capacitance of a coil, because when you have a coil made of thick wire and you have just a few turns, it cannot be negected in general.

the_emi_guy: thank you very much for the software. It seems rather professional. It'll take some time to learn how to use it though.

Register to reply

Related Discussions
Capacitance from capacitance matrix Electrical Engineering 0
Projected Capacitance Touchscreen, confused by how the capacitance is formed. Electrical Engineering 4
Capacitance of a body versus capacitance of inscribed and circumscribed spheres Classical Physics 0
Circuit with 2 loops, find the current in one of the loops Introductory Physics Homework 2
Loops '08 will be in the UK! Beyond the Standard Model 13