Confusion (1 Viewer)

[Jago]

In the attachment below, does the current go from A to B, or B to A?

I think the answer is A to B but wouldn't the electrons being -ve mean that it would travel from -ve to +ve?

 

[serge]

In the attachment below, does the current go from A to B, or B to A?

I think the answer is A to B but wouldn't the electrons being -ve mean that it would travel from -ve to +ve?

conventional current is positive to negative

but electrons travel from negative to positive

 

[Jago]

yep, so the answer would be?

 

[mattchan]

Conventional Current travels from A to B (positive terminal to negative terminal), while electron flow is from B to A(negative terminal to positive terminal).

 

[Tri]

I say A to B . Unless the question specifically asks you for electron flow, always go with conventional.

I only found that out a month ago =/

 

[tpc13]

Current was originally considered to be a flow of positive charge, and so it was labelled as flowing from positive to negative (the direction in which positive charge would flow). It was later discovered that it was actually the negative charges that moved, but for convention's sake they left it as positive to negative.

So yes, it is A to B. Current is always taken as flowing from positive to negative.

My question is: on the symbol for a battery, which is the positive end? The long thin line, or the short, fat line?

 

[Jago]

thakns for clearing that up

the longer line is +, the shorter is -