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1 vote
1 answer
137 views

Finding free electron concentration to check authors' calculations for electron drift velocity

I am currently studying Practical Electronics for Inventors, Fourth Edition, by Scherz and Monk. Chapter 2.5.1 How the Shape of a Conductor Affects Resistance presents the following image: I ...
The Pointer's user avatar
  • 1,281
26 votes
3 answers
53k views

How does data travel inside a wire?

I know this is a very basic question but the answers returned by google are way too complicated for me to understand. I am not asking about modulation here. What I want to know is what exactly is ...
Sunshine's user avatar
  • 371
9 votes
4 answers
3k views

Flow of electrons in a wire

Electricity is "flow of electrons". My child asked me if this is so, then ultimately the copper wire should disappear/vanish/finish because the matter is moving from one place to the other. I am not ...
Hamayun Ali Shah's user avatar
1 vote
3 answers
891 views

What happens to a DC current at the end of a wire?

This question might be a little more appropriate for the physics stack, but I'd like to test the water here first. I am just getting into electrical engineering, and as I go along, certain aspects ...
user40262's user avatar