23. a vector field is defined everywhere as f=i+zk. the net flux of f associated l with a cube of side l, with one vertex at the origin and sides along the posi

23. A vector field is defined everywhere as F=i+zk. The net flux of F associated L with a cube of side L, with one vertex at the origin and sides along the positive X, Y and Z axes, is: [GATE 2007] (a) (b) 4 (c)8. (d) 10 4L