Question

A rectangular loop carrying a current is situated near a long straight wire such that the wire is parallel to one of the sides of the loop and is in the plane of the loop. If a steady current its created in wire as shown in figure below, then the loop will
A. rotate about an axis parallel to the wire
B. move towards the wire
C. move away from the wire or towards right
D. remains stationary

Answer 1

Answer:

A. Will be correct answer

Explanation:

force will be perpendicular to the force and leff of wire.

Answer 2

Answer:

the ans will be

B)

Explanation:

according to the right hand rule,

(please refer to the 1st attachment)

the lines of force will be cancelled.

that is,

there will be no electric lines of force on the left part of the rectangular loop.

but there remains electric lines on the upper, lower and the right side

here, upper and lower loops are balanced,,

but there is no electric lines of force on the left though it has on the right.

so either the rectangular loop will move left or right (not up or down)

• that is, it rotates about an axis parallel to the wire