Question

A rectangular loop carrying a current i is situated near a long straight wire such that the wire is parallel to the one of the sides of the loop and is in the plane of the loop. If a steady current I is established in wire as shown in figure, the loop will

• A. Rotate about an axis parallel to the wire
• B. Move away from the wire or towards right
• C. Move towards the wire
• D. Remain stationary

Answer 1

Answer: (C)

Move towards the wire

Answer 2

$\because r _ { 1 } < r _ { 2 }$

So F₁ > F₂

$\Rightarrow F _ { n e t } = \left( F _ { 1 } - F _ { 2 } \right)$

Towards the wire