Question

how will you recognise X magnetic field experimentally

Answer 1

Dear student,
Recognition of the magnetic field around a magnet: If a magnet is placed below a sheet of stiff paper and some iron filings are spread on it, then on tapping the sheet gently, the iron filings are found to arrange themselves in a definite pattern. OR

Any source of magnetism, such as a magnet or electromagnet, is surrounded by a magnetic field. That field can be detected by various devices, which can also give information about the direction of the field and even its strength. A simple compass can detect a magnetic field and demonstrate its direction.
Regards.