Choose the correct sketch of the magnetic field lines of a circular current loop shown by the dot $$ \text {…
Choose the correct sketch of the magnetic field lines of a circular current loop shown by the dot
$$
\text { and the cross } \otimes \text {. }
$$
Solution
If magnetic field is perpendicular and into the plane of the paper, it is represented by cross $\otimes$ and if the direction of the magnetic field is perpendicular out of the plane of the paper it is represented by dot $\odot$.
