Question

The resulting magnetic field at the point O due to the current carrying wire shown in the figure:

• A. Points out of the page
• B. Points into the page
• C. Is zero
• D. Is the same as due to the segment WX along.

Answer 1

The correct option is B Points into the page

Here,

The magnetic field at point O,

is zero due to uv,yz

And cancel each other in case of vw,xy,

And the part wx has magnetic field into the plane of paper (by right hand rule)

$\text{Note:}$right hand rule states that in case of a line current, point the thumb in the

direction of current, and curl your fingers, the direction of curl gives the direction

of magnetic field at any point.

Option $\text{B}$ is the correct answer.