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- https://phys.libretexts.org/Bookshelves/College_Physics/College_Physics_1e_(OpenStax)/22%3A_Magnetism/22.09%3A_Magnetic_Fields_Produced_by_Currents-_Amperes_LawThe strength of the magnetic field created by current in a long straight wire is given by \[B = \frac{\mu_{0}I}{2 \pi r} \left(long \quad straight \quad wire\right),\tag{22.10.1}\] where \(I\) is the ...The strength of the magnetic field created by current in a long straight wire is given by \[B = \frac{\mu_{0}I}{2 \pi r} \left(long \quad straight \quad wire\right),\tag{22.10.1}\] where \(I\) is the current, \(r\) is the shortest distance to the wire, and the constant \(\mu_{0} = 4\pi \times 10^{-7} T \cdot m/a\) is the permeability of free space. The direction of the magnetic field created by a long straight wire is given by right hand rule 2 (RHR-2): Point the thumb of the right hand in the d
- https://phys.libretexts.org/Bookshelves/Electricity_and_Magnetism/Electromagnetics_I_(Ellingson)/10%3A_Appendices/10.07%3A_Physical_Constants(unable to fetch text document from uri [status: 403 (Forbidden)])
- https://phys.libretexts.org/Courses/Georgia_State_University/GSU-TM-Physics_II_(2212)/07%3A_Sources_of_Magnetism_Magnetic_Forces_and_Fields/7.09%3A_The_Biot-Savart_LawUse the right-hand rule to verify the direction of the magnetic field produced from the current or to write down the direction of the magnetic field if only the magnitude was solved for in the previou...Use the right-hand rule to verify the direction of the magnetic field produced from the current or to write down the direction of the magnetic field if only the magnitude was solved for in the previous part.
- https://phys.libretexts.org/Courses/Berea_College/Electromagnetics_I/10%3A_Appendices/10.07%3A_Physical_ConstantsThe speed of light in free space (\(c\)), which is the phase velocity of any electromagnetic radiation in free space, is \(\cong 2.9979 \times 10^8\) m/s. The wave impedance of free space (\(\eta_0\))...The speed of light in free space (\(c\)), which is the phase velocity of any electromagnetic radiation in free space, is \(\cong 2.9979 \times 10^8\) m/s. The wave impedance of free space (\(\eta_0\)) is the ratio of the magnitude of the electric field intensity to that of the magnetic field intensity in free space and is \(\sqrt{\mu_0/\epsilon_0}\cong 376.7~\Omega\).
- https://phys.libretexts.org/Courses/Kettering_University/Electricity_and_Magnetism_with_Applications_to_Amateur_Radio_and_Wireless_Technology/08%3A_The_Magnetic_Field/8.04%3A_The_Biot-Savart_LawWe have seen that mass produces a gravitational field and also interacts with that field. Charge produces an electric field and also interacts with that field. Since moving charge (that is, current) i...We have seen that mass produces a gravitational field and also interacts with that field. Charge produces an electric field and also interacts with that field. Since moving charge (that is, current) interacts with a magnetic field, we might expect that it also creates that field—and it does.
- https://phys.libretexts.org/Bookshelves/University_Physics/University_Physics_(OpenStax)/University_Physics_II_-_Thermodynamics_Electricity_and_Magnetism_(OpenStax)/12%3A_Sources_of_Magnetic_Fields/12.02%3A_The_Biot-Savart_LawWe have seen that mass produces a gravitational field and also interacts with that field. Charge produces an electric field and also interacts with that field. Since moving charge (that is, current) i...We have seen that mass produces a gravitational field and also interacts with that field. Charge produces an electric field and also interacts with that field. Since moving charge (that is, current) interacts with a magnetic field, we might expect that it also creates that field—and it does.
- https://phys.libretexts.org/Bookshelves/University_Physics/Radically_Modern_Introductory_Physics_Text_II_(Raymond)/16%3A_Generation_of_Electromagnetic_Fields/16.05%3A_Moving_Charge_and_Magnetic_FieldsSince the four-potential is tangent to the particle’s world line, and hence is parallel to the time axis in the reference frame in which the charged particle is stationary, we know how to resolve the ...Since the four-potential is tangent to the particle’s world line, and hence is parallel to the time axis in the reference frame in which the charged particle is stationary, we know how to resolve the space and time components of the four-potential in the reference frame in which the charge is moving.
- https://phys.libretexts.org/Courses/Georgia_State_University/GSU-TM-Introductory_Physics_II_(1112)/07%3A_Magnetism/7.10%3A_Magnetic_Fields_Produced_by_Currents-_Amperes_LawThe direction of the magnetic field created by a long straight wire is given by right hand rule 2 (RHR-2): Point the thumb of the right hand in the direction of current, and the fingers curl in the di...The direction of the magnetic field created by a long straight wire is given by right hand rule 2 (RHR-2): Point the thumb of the right hand in the direction of current, and the fingers curl in the direction of the magnetic field loops created by it. a rule to determine the direction of the magnetic field induced by a current-carrying wire: Point the thumb of the right hand in the direction of current, and the fingers curl in the direction of the magnetic field loops
- https://phys.libretexts.org/Courses/Muhlenberg_College/Physics_122%3A_General_Physics_II_(Collett)/08%3A_Sources_of_Magnetic_Fields/8.02%3A_The_Biot-Savart_LawWe have seen that mass produces a gravitational field and also interacts with that field. Charge produces an electric field and also interacts with that field. Since moving charge (that is, current) i...We have seen that mass produces a gravitational field and also interacts with that field. Charge produces an electric field and also interacts with that field. Since moving charge (that is, current) interacts with a magnetic field, we might expect that it also creates that field—and it does.
- https://phys.libretexts.org/Courses/Grand_Rapids_Community_College/PH246_Calculus_Physics_II_(2025)/08%3A_Sources_of_Magnetic_Fields/8.02%3A_The_Biot-Savart_LawWe have seen that mass produces a gravitational field and also interacts with that field. Charge produces an electric field and also interacts with that field. Since moving charge (that is, current) i...We have seen that mass produces a gravitational field and also interacts with that field. Charge produces an electric field and also interacts with that field. Since moving charge (that is, current) interacts with a magnetic field, we might expect that it also creates that field—and it does.
