Question

A messy loop of limp wire is placed on a frictionless table and anchored at points a and b as shown in Fig. If a steady current i is passed through, then wire will-

• A. Try to form a circular loop
• B. Try to bunch up further
• C. Try to be in parallel as on left side of figure
• D. Try to twist one over the other

Answer 1

Answer: (A)

Try to form a circular loop

Answer 2

Due to opposite current in all facing small section repulsion is there so loop becomes circular.