Eight wires cut the page perpendicularly at the points shown in figure. A wire labelled with the integer k, (k=1,2,....8) bears the current ki0. For those with odd k, the current flows up out of the page; for those with even k, current flows down into the page. The value of ∮→B⋅d→l along the close path (as shown in the figure) in the direction indicated by the arrow is,[Take out of the page as positive and into the page as negative]

Eight wires cut the page perpendicularly at the points shown in figure

1.	Eight wires cut the page perpendicularly at the points shown in figure. A wire labelled with the integer k, (k=1,2,....8) bears the current ki0. For those with odd k, the current flows up out of the page; for those with even k, current flows down into the page. The value of ∮→B⋅d→l along the close path (as shown in the figure) in the direction indicated by the arrow is,[Take out of the page as positive and into the page as negative]
Answer» Eight wires cut the page perpendicularly at the points shown in figure. A wire labelled with the integer $k$ , $(k = 1, 2, . . . .8)$ bears the current $k i_{0}$ . For those with odd $k,$ the current flows up out of the page; for those with even $k,$ current flows down into the page. The value of $\oint \to B \cdot d \to l$ along the close path (as shown in the figure) in the direction indicated by the arrow is, [Take out of the page as positive and into the page as negative]