Why is the magnetic field line circular outside a solenoid but straight inside the solenoid? - Quora
![Magnetic field of a current-carrying coil. Electromagnetic coil, conductor, made of a copper wire spiral. In the helix the field lines are parallel and directed from north to south pole. Illustration. Stock Magnetic field of a current-carrying coil. Electromagnetic coil, conductor, made of a copper wire spiral. In the helix the field lines are parallel and directed from north to south pole. Illustration. Stock](https://as1.ftcdn.net/v2/jpg/01/19/26/08/1000_F_119260871_mhhO2ym1xmQXgVEYJfyHtT9Z9Y14SEs4.jpg)
Magnetic field of a current-carrying coil. Electromagnetic coil, conductor, made of a copper wire spiral. In the helix the field lines are parallel and directed from north to south pole. Illustration. Stock
![Cylindrical drive coil generating an homogeneous magnetic field in the... | Download Scientific Diagram Cylindrical drive coil generating an homogeneous magnetic field in the... | Download Scientific Diagram](https://www.researchgate.net/profile/Gael-Bringout/publication/264397310/figure/fig2/AS:613889892950028@1523374164289/Cylindrical-drive-coil-generating-an-homogeneous-magnetic-field-in-the-y-direction-The.png)