Which direction they allow a current to pass in this drawing? This or

[Femme_physics]

Which direction they allow a current to pass in this drawing? This or that?

http://img819.imageshack.us/img819/820/diodessss.jpg

 

[I like Serena]

This!

Current is allowed in the direction of the arrow.
The reverse direction starts with a "blocking" line crossing the wire, meaning current is blocked.

 

[Femme_physics]

hah, hi ILS!

The...above one...yes?

 

[I like Serena]

Yes!

 

[Femme_physics]

That's how I thought it should be but something confused me. Now it makes sense. thanks!