why do currents create magnetic fields ?

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why do currents create magnetic fields ?

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https://www.khanacademy.org/science/physics/magnetic-forces-and-magnetic-fields/magnetic-field-current-carrying-wire/a/what-are-magnetic-fields

https://www.khanacademy.org/science/physics/magnetic-forces-and-magnetic-fields/magnetic-field-current-carrying-wire/a/what-are-magnetic-fields
What are magnetic fields? (article) | Khan Academy
A magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic. [Explain] Most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them. We understand that magnets have two poles and that depending on …

https://phys.libretexts.org/Bookshelves/College_Physics/College_Physics_1e_(OpenStax)/22:_Magnetism/22.09:_Magnetic_Fields_Produced_by_Currents-_Amperes_Law

https://phys.libretexts.org/Bookshelves/College_Physics/College_Physics_1e_(OpenStax)/22:_Magnetism/22.09:_Magnetic_Fields_Produced_by_Currents-_Amperes_Law
22.9: Magnetic Fields Produced by Currents- Ampere’s Law
20 févr. 2022Figure 22.9.3: (a) Because of its shape, the field inside a solenoid of length l is remarkably uniform in magnitude and direction, as indicated by the straight and uniformly spaced field lines. The field outside the coils is nearly zero. (b) This cutaway shows the magnetic field generated by the in the solenoid.

https://www.electricity-magnetism.org / how-does-an-electric-current-produce-a-magnetic-field

https://www.electricity-magnetism.org / how-does-an-electric-current-produce-a-magnetic-field
How does an electric current produce a magnetic field?
11 juin 2023Oersted’s Discovery. The connection between electric currents and magnetic fields was first discovered by Danish scientist Hans Christian Oersted in 1820. Oersted found that when an electric current flowed through a wire, it created a magnetic field around the wire, causing a nearby compass needle to deflect. This groundbreaking discovery …

https://www.britannica.com/science/magnetism/Magnetic-field-of-steady-currents

https://www.britannica.com/science/magnetism/Magnetic-field-of-steady-currents
Magnetism – Electric Currents, Forces, Fields | Britannica
A magnetic field produced by a small section of wire with electric current i. Magnetic fields produced by electric currents can be calculated for any shape of circuit using the law of Biot and Savart, named for the early 19th-century French physicists Jean-Baptiste Biot and Félix Savart. A few magnetic field lines produced by a in a …

https://openstax.org/books/physics/pages/20-1-magnetic-fields-field-lines-and-force

https://openstax.org/books/physics/pages/20-1-magnetic-fields-field-lines-and-force
20.1 Magnetic Fields, Field Lines, and Force – OpenStax
Thus, using I = q/t I = q / t, we obtain. F = IℓB sin θ(1.4). F = I ℓ B sin θ (1 .4). 20.6. This equation gives the force on a straight current-carrying wire of length ℓ ℓ in a magnetic field of strength B. The angle θ θ is the angle between the current vector and the magnetic field vector.

https://phys.libretexts.org/Bookshelves/Conceptual_Physics/Introduction_to_Physics_(Park)/04:_Unit_3-_Classical_Physics_-_Thermodynamics_Electricity_and_Magnetism_and_Light/10:_Magnetism/10.08:_Magnetic_Fields_Produced_by_Currents-_Amperes_Law

https://phys.libretexts.org/Bookshelves/Conceptual_Physics/Introduction_to_Physics_(Park)/04:_Unit_3-_Classical_Physics_-_Thermodynamics_Electricity_and_Magnetism_and_Light/10:_Magnetism/10.08:_Magnetic_Fields_Produced_by_Currents-_Amperes_Law
10.8: Magnetic Fields Produced by Currents- Ampere’s Law
20 févr. 2022The magnetic field created by current following any path is the sum (or integral) of the fields due to segments along the path (magnitude and direction as for a straight wire), resulting in a general relationship between current and field known as Ampere’s law. The magnetic field strength at the center of a circular loop is given by.

https://openstax.org/books/college-physics/pages/22-9-magnetic-fields-produced-by-currents-amperes-law

https://openstax.org/books/college-physics/pages/22-9-magnetic-fields-produced-by-currents-amperes-law
22.9 Magnetic Fields Produced by Currents: Ampere’s Law
Answers to these questions are explored in this section, together with a brief discussion of the law governing the fields created by currents. Magnetic Field Created by a Long Straight Current-Carrying Wire: Right Hand Rule 2. Magnetic fields have both direction and magnitude.

https://openstax.org/books/physics/pages/20-3-electromagnetic-induction

https://openstax.org/books/physics/pages/20-3-electromagnetic-induction
20.3 Electromagnetic Induction – Physics | OpenStax
If nature is symmetrical, then perhaps a magnetic field can create a current. In 1831, some 12 years after the discovery that an electric current generates a magnetic field, English scientist Michael Faraday (1791-1862) and American scientist Joseph Henry (1797-1878) independently demonstrated that can produce .

https://pressbooks.bccampus.ca/introductorygeneralphysics2phys1207/chapter/22-9-magnetic-fields-produced-by-currents-amperes-law

https://pressbooks.bccampus.ca/introductorygeneralphysics2phys1207/chapter/22-9-magnetic-fields-produced-by-currents-amperes-law
7.0 Magnetic Fields Produced by Currents: Ampere’s Law
The magnetic field created by current following any path is the sum (or integral) of the fields due to segments along the path (magnitude and direction as for a straight wire), resulting in a general relationship between current and field known as Ampere’s law. The magnetic field strength at the centre of a circular loop is given by.

https://education.nationalgeographic.org/resource/magnetism

https://education.nationalgeographic.org/resource/magnetism
Magnetism – Education | National Geographic Society
19 oct. 2023Earth is a magnet. Scientists do not fully understand why, but they think the movement of molten metal in Earth’s outer core generates electric currents. The currents create a magnetic field with invisible lines of force flowing between Earth’s magnetic poles. The geomagnetic poles are not the same as the North and South Poles.
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