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UnkleRhaukus
 3 years ago
Is electric current a scalar? Can it be negative?
UnkleRhaukus
 3 years ago
Is electric current a scalar? Can it be negative?

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.Sam.
 3 years ago
Best ResponseYou've already chosen the best response.0THAT is what I thought also

UnkleRhaukus
 3 years ago
Best ResponseYou've already chosen the best response.0i got it wrong, i dont really understand why

DLS
 3 years ago
Best ResponseYou've already chosen the best response.1Current is scalar and it cannot be negative.

DLS
 3 years ago
Best ResponseYou've already chosen the best response.1\[\LARGE I=  \frac{dQ}{dt}\] indicates that flow of current per unit time is decreasing maybe the question posted is a subpart of another question or perhaps incomplete.

yrelhan4
 3 years ago
Best ResponseYou've already chosen the best response.1the convention that we follow is movement of ve charge as current right?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0@DLS current can be negative

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0normally we don't take current as a vector and instead use the length vector instead.

ganeshie8
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1367418867689:dw

ganeshie8
 3 years ago
Best ResponseYou've already chosen the best response.0if i assume that way is +ve, then the reverse of it will be ve. in a circuit we assume current directions initially. based on that we get ve or +ve numbers after analysis

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0becoz current does'nt follow vector algebra so, it is scalar.

agent0smith
 3 years ago
Best ResponseYou've already chosen the best response.0"the convention that we follow is movement of ve charge as current right?" I think this is why. Current is created by flow of electrons which go from  to +, but current is defined as + to .

agent0smith
 3 years ago
Best ResponseYou've already chosen the best response.0Still, this site uses no negative sign, it has your answer... http://physics.tutorvista.com/electricityandmagnetism/electriccurrent.html

UnkleRhaukus
 3 years ago
Best ResponseYou've already chosen the best response.0maybe electric current is a phasor

agent0smith
 3 years ago
Best ResponseYou've already chosen the best response.0Hmm, i guess current can be negative, because it does have direction (it can come up like that when using Kirchoff's laws, to find current in loops of a circuit).

yrelhan4
 3 years ago
Best ResponseYou've already chosen the best response.1http://openstudy.com/study#/updates/4fb98da9e4b05565342e8394 Look what phoneix_rags and chrsimmo have said.. hmm.. scalar i'd say now..

yrelhan4
 3 years ago
Best ResponseYou've already chosen the best response.1and why it is not a vector even though it has direction... i'll give it to ruchi.. still not 100% sure about what current is.. but scalar looks good to me.

yrelhan4
 3 years ago
Best ResponseYou've already chosen the best response.1ok another example.. for force on a current carrying wire in a magnetic field F=IdL×B .. here B is a vector.. and dL is a vector. we take the the direction of current to decide the direction of dL.. and it completely depends on what coordinate system we choose.
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