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How does current flow? From + to - or vice versa. Why? Please explain.

How does current flow? From + to - or vice versa. Why? Please explain.

Grade:12

2 Answers

Ramesh V
70 Points
11 years ago

It depends on what you define as “electricity”.  Do you mean the flow of “electrons” or the flow of “current”?  Because, the history says, the direction of current flow is opposite to the direction of electron flow

If electrons are flowing to the right across this screen, then we say that current is flowing to the left.

So, let’s say that the left hand side of this screen is the positive terminal and the right hand side is the negative terminal
                                                +                  -

Electrons will flow towards the opposite charge, as you say.  Its direction is  Right to left
                                       <—-  electrons

But current is the opposite direction.  i.e., Left to right.
                                         —-> current

So current does flow from positive to negative, like our books say. We define electric current to be the opposite direction of electron flow.

The following figures explaims more clearly:

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Please feel free to post as many doubts on our disucssion forum as you can. If you find any question difficult to understand - post it here and we will get you the answer and detailed solution very quickly. We are all IITians and here to help you in your IIT JEE preparation. All the best Ramesh..!!!!

Regards,
Naga Ramesh
IIT Kgp - 2005 batch

AskIITians Expert PRASAD IIT Kharagpur
18 Points
11 years ago

 

Current will flow from  +ve to -ve.

Current always flows from higher potential to lower potential.

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