27. Current density is?
(A) a scalar quantity
(B) a vector quantity
(C) dimensionless
(D) None of the above
Answer: B
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Current density is a vector quantity having both a direction and a scalar magnitude.
Current density is referred to as the total amount of current which is flowing through one unit value of a cross-sectional area. If this is of uniform current flow, then the amount of current which is flowing through a specific conductor is the same at all points of the conductor, even if the conductor area differs.