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The scientific principle involved in production of ultra-high magnetic field is-
(a) Super conductivity
(b) Digital logic
(c) Photoelectric effect
(d) Law of thermodynamics

Last updated date: 24th Jul 2024
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Hint: A magnetic field is a vector field that defines the effect of magnetism on moving electric charges, electric currents, and magnetic materials. In a magnetic field, a moving charge is subjected to a force that is perpendicular to both its own velocity and the magnetic field.

Complete step by step answer:
Ultra high magnetic field: Permanent magnets currently produce magnetic fields on the order of \[2{\text{ }}tesla\]. (One tesla, abbreviated \[T\], equals \[10,000{\text{ }}gauss\] and is roughly \[50,000\] times the magnetic field of Earth at \[50{\text{ }}degrees\] latitude.) Electromagnets can generate much higher fields.
When a sufficiently strong magnetic field is applied to a superconductor, the superconducting state is generally destroyed. This is the product of two processes. The Zeeman effect, which occurs when paired electrons are in a spin-singlet (but not a spin-triplet) state, separates them. The second is the 'orbital' effect, in which vertices reach superconductors and the energy gain due to the formation of paired electrons is lost. As a result, having more conductivity would make producing ultra-magnetic fields simpler.
Hence, the scientific principle involved in the production of ultra-high magnetic fields is super conductivity.
So, the correct option is (a).

Note: The magnetic field is strongest in the centre of the bar magnet and weakest between the two poles just outside. The magnetic field lines are least dense in the middle and densest just beyond the bar magnet between the two poles.