I am a new highschool physics instructor and I want to show to my students the basic concept inside the capacitors.

i plan on showing them via simple 2 copper wires side by side each other, supplied with battery, constructed on a breadboard, and measuring via multimeter (which can measure mA), we can measure capacitance.

But I am afraid it would fail, the school does not have that much supply though, I do not have my own multimeter but planning to buy one if somebody here at Physics stackexchange can confirm a setup that I can measure capacitance and tell me the appropriate parameters.

I got this idea from the formula, which states that at some point, at the correct Area and distance to each other, 2 copper wires supplied with voltages can give me capacitance.

[![enter image description here][1]][1]

So, if you guys have any spare time and device, can you please experiment on what length 2 copper wires, side by side, is enough to measure capacitance, I do not also have any idea if 9V battery is enough, maybe I can series battery to reach higher voltages.

Please help. Thanks!

Setup:
[![enter image description here][2]][2]


  [1]: https://i.sstatic.net/jSWPr.png
  [2]: https://i.sstatic.net/IOiJe.png

Hope somebody can try. Thanks!