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is current vector? is current vector?

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Old Wednesday, September 07, 2011
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Default is current vector?
as we all knows that current has both magnitude and direction but we consider it a scalar quantity ?
y is it so?

according to my knowledge as it does'nt obey vector addition etc thats y we call it scalar quantity.if m wrong do correct me. waiting 4 respond!
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Old Thursday, September 08, 2011
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Quote:
Originally Posted by ravaila View Post
as we all knows that current has both magnitude and direction but we consider it a scalar quantity ?
y is it so?

according to my knowledge as it does'nt obey vector addition etc thats y we call it scalar quantity.if m wrong do correct me. waiting 4 respond!
@ravila
according to my little knowledge current is scalar because of two reasons.
as current is I = q/t , q and t both are scalar so current is scala.
2 is that current do not follow vector rule for addition so it is scalar. it example is from kirchofs current rule. hope it is correct
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Last edited by Princess Royal; Thursday, September 08, 2011 at 08:38 AM. Reason: do not extend the punctuation marks, thank you !
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Old Thursday, September 08, 2011
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there is no physical change in direction, to be classified as a vector change should be physical, current is due to vibration of electrons by transfer of energy so it is scalar unlike velocity, acceleration etc.
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Old Thursday, September 08, 2011
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Very special 1 is more than right,these are the only two reasons because of which we consider current as scalar quantity.
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Old Thursday, September 15, 2011
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its only reason is that current is ratio of scalar quantities so it is not a vector quantity similar to area of a plane , that is also a scalar but for its physical representation we use its direction normal to the plane.
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