Which way does electricity travel? (1 Viewer)

[Demise]

If the current travels to the right, that means electrons travel to the left right? Is that the justification for answer B?

If it's too small:
http://puu.sh/1lgYG

 

[Shadowless]

BUMP!

 

[deswa1]

Yep. Boron makes it P-Type conductor which leads to an excess of holes in the valence band so you can eliminate C and D already. Then holes go to the right because electrons go to the left (towards the positive end)

 

[lemon1]

i know the answer but i don't know how they got it, and i do know everything about extrinsic n/p type semiconductors