Hi Jim,
As often occurs when this kind of subject comes up, ambiguity and/or imprecise use of terminology muddles the issue. If you replace his use of the word "charge" with the words "charge carrier," I think what he says then becomes pretty much correct.
As explained by Kijanki with the balls in a tube analogy, and as alluded to in my long post in this thread dated 8-23-2017 at 7:08 p.m. EDT (although what I said in that post was stated in terms signal energy rather than charge), charge propagates at near light speed, while charge carriers (electrons, in the case of a metallic conductor) move very slowly. And current, defined in terms of amperes, is proportional to the average number of charge carriers traversing a given cross-section of the conductor per unit time.
Best regards,
-- Al
As often occurs when this kind of subject comes up, ambiguity and/or imprecise use of terminology muddles the issue. If you replace his use of the word "charge" with the words "charge carrier," I think what he says then becomes pretty much correct.
As explained by Kijanki with the balls in a tube analogy, and as alluded to in my long post in this thread dated 8-23-2017 at 7:08 p.m. EDT (although what I said in that post was stated in terms signal energy rather than charge), charge propagates at near light speed, while charge carriers (electrons, in the case of a metallic conductor) move very slowly. And current, defined in terms of amperes, is proportional to the average number of charge carriers traversing a given cross-section of the conductor per unit time.
Best regards,
-- Al

