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Current density vec(j ) at an area vec( ...

Current density `vec(j )` at an area `vec( A) = ( 2 hat(i ) + 3 hat(j) ) m m^(2) ` is `vec(j) = ( 3 hat(j) + 4 hat(k)) xx 10^(3) A //m^(2)` . Current through the area is

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