3.2.3 (1 Viewer)

[kimmeh]

when an electron come out of its "hole", which way does it move? does it create a negative current? i'm so lost

also, on csu they said "The apparent movement of holes in the opposite direction can be considered as a flow of positive charge. " what does this mean? they create a positive current?

 

[juggernaut]

ur so ahead ;(

 

[kimmeh]

we havent done the space module yet. its our next one

 

[juggernaut]

ohhhhhhhhhh

 

[t-i-m-m-y]

hole is defined as absence of electrons ie. positive charge

hence electron and hole move in opposite direction

when electron moves, it leaves a "hole" behind--> can be considered as an excess of relative positive charge, and another electron moves to fill the "hole". however that second electron itself creates a hole as it fills the first one so u can see how they move in opp directions

i hope that helps ya

 

[xiao1985]

yea, dat's pretty much it... =p

but electrons move in a brownian motion after it comes out of its hole (somehow)... brownian motion: a fancy word for moving randomly... and NO it doens't create a negative current... only when electrons have a tendency to move to one direction will it create a current... electrons in wires etc under go brownian motion all the time wif out the influence of an external magnetic/eletric field...

 

[Xayma]

The apparent motion is often used as a way of explaining conventional current, if you have a row of electrons with a hole moving to the left, the hole will move to the right (assuming an electron goes to fill that hole, coming out of its own).

 

[steph@nie]

haha we're not even close to doing that bit of ideas.. haha

 

[t-i-m-m-y]

conventional current is the flow of positive charge

while in reality e-s flow the other way, we physicisits are used to using +ve charge (hence the holes)