Diodes and resistance

  • Thread starter abdo799
  • Start date
  • #1
169
4

Main Question or Discussion Point

I was learning about how diodes work , I read on some sites that diodes have a very low resistance in forward and very big resistance on backward. I read on other sites that diodes allow current in one direction only and no current in the other . So which is right , they 're not the same thing ( big resistance = small current and not no current at all )
 

Answers and Replies

  • #2
SteamKing
Staff Emeritus
Science Advisor
Homework Helper
12,798
1,666
The ideal diode would have zero resistance in the forward direction and infinite resistance in the backward direction. Since diodes are fabricated from real materials, these ideal resistance properties can only be closely approximated.

http://en.wikipedia.org/wiki/Diode

This article shows the I-V characteristics of a typical p-n junction diode (Figure 5).
 

Related Threads for: Diodes and resistance

  • Last Post
Replies
10
Views
2K
  • Last Post
Replies
10
Views
3K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
1
Views
5K
Replies
3
Views
858
  • Last Post
Replies
9
Views
4K
  • Last Post
Replies
2
Views
725
Replies
2
Views
4K
Top