> CS>Re: Current limiting by low range setting of RS "true rms" DVM's > From: jrowland > Date: Sun, 18 May 2003 13:05:51
>> The wetted area is A = pi * (0.75^2) = 1.767 sq. in. > That's the wetted area of ONE SIDE of the coin, nor does it take > into consideration the 1/8" wide edge. > jr True. The area of the edge is simply the face area integrated though the thickness. So that's A = 1.5 * 0.125 = 0.1875 which is negligible. How do you prove the current density is equal on both sides, and what do you do with the sharp edge effect? According to basic electrostatics, this increases the field gradient and results in higher current density. This leads to larger particles. Round wire has no sharp edges. How do you mount the alligator clips to guarantee you always have the same orientation and spacing? Cleaning the coins is going to move them, so you will have trouble getting them back in exactly the same position. You can bolt 12 ga wire to a plastic lid. It won't move during cleaning. How do you increase the wetted area to reduce the current density? You can't flatten the coins, and mounting several in parallel is going to be a headache. You can easily fold 12 ga. wire into a "W" with your fingers. I'd use the coins to buy some 12 ga wire:) Best Regards, Mike Monett -- The silver-list is a moderated forum for discussion of colloidal silver. Instructions for unsubscribing may be found at: http://silverlist.org To post, address your message to: [email protected] Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <[email protected]>
