The picture below shows an iron-filing pattern, which reveals the nature of the magnetic field surrounding a current-carrying wire.
(The picture below; shows; an iron-filing pattern, which reveals the nature of the magnetic field) (an iron-filing pattern; reveals; the nature of the magnetic field) (the magnetic field; surrounding; a current-carrying wire)
The picture below an iron-filing pattern the magnetic field
shows reveals surrounding
an iron-filing pattern, which reveals the nature of the magnetic field
the nature of the magnetic field
a current-carrying wire