A long straight wire carries a current of $10\ \text{A}$. A rectangular loop lies in the same plane, as shown in the figure. Its two long sides, each $20\ \text{cm}$, are parallel to the wire, and its short sides are $10\ \text{cm}$. The nearer long side is $5\ \text{cm}$ from the wire. The loop carries $5\ \text{A}$, flowing in its nearer side in the same direction as the current in the wire. The net magnetic force on the loop is

Fig. 1: A long straight wire carrying 10 A, and beside it in the same plane a rectangular loop carrying 5 A. The 20 cm sides of the loop are parallel to the wire, the nearer one 5 cm away, and the short sides are 10 cm.