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You can detect the presence of a magnetic field using a compass, which will align itself with the field lines. Other devices such as magnetometers can also detect and measure magnetic fields accurately. Additionally, certain materials, such as iron filings, can visualize magnetic field patterns when sprinkled around the area.
Lines of magnetic force are a human device for imagining them. There are no lines as such. The lines we draw are contour lines, analogous to lines of equal force. As to your question, the Magnetosphere is possibly that which you seek.
Lines of Force
They are called the magnetic field lines.
Magnetic field lines don't cross.
The direction of magnetic field lines are from north to south
The closer the magnetic field lines, the stronger the magnetic force in that area.
Light that comes from the sun is polarized by these magnetic fields. A meter can determine the different directions of the light and detect interference. This interference is known as a magnetic field.
straight parallel lines
They are called the magnetic field lines.
The magnetic field lines are arranged circularly around the wire.
Magnetic field is made up of magnetic lines.