عنوان فارسی مقاله: دلیل جریان میدان مغناطیسی
عنوان انگلیسی مقاله:
فهرست مطالب
Magnetic Fields due to Currents
Learning Objectives
Learning Objectives
Force Between Two Parallel Currents
Ampere’s Law
Solenoids and Toroids
A Current-Carrying Coil as a Magnetic Dipole
Summary
بخشی از مقاله
Magnetic Field of a Toroid
Figure (a) shows a toroid, which we may describe as a (hollow) solenoid that has been curved until its two ends meet, forming a sort of hollow bracelet. What magnetic field B is set up inside the toroid (inside the hollow of the bracelet)? We can find out from Ampere’s law and the symmetry of the bracelet. From the symmetry, we see that the lines of B form concentric circles inside the toroid, directed as shown in Fig. (b). Let us choose a concentric circle of radius r as an Amperian loop and traverse it in the clockwise direction. Ampere’s law yields
where i is the current in the toroid windings (and is positive for those windings enclosed by the Amperian loop) and N is the total number of turns. This gives
کلمات کلیدی:
Magnetic fields of currents - HyperPhysics Concepts hyperphysics.phy-astr.gsu.edu/hbase/magnetic/magcur.html The magnetic field lines around a long wire which carries an electric current form concentric circles around the wire. The direction of the magnetic field is ... [PDF]Chapter 29: Magnetic Fields Due to Currents www.phys.ufl.edu/courses/phy2049/f08/lectures/2049_ch29A.pdf 1. Chapter 29: Magnetic Fields Due to Currents ... →Magnetic field produced by current is fundamental. ◇How about field produced by a bar magnet? Magnetic Fields due to currents | Mini Physics - Learn Physics Online https://www.miniphysics.com › A Level › Electromagnetism (A Level) The magnetic flux density at a distance d from the current carrying wire is given by: $B = \frac{\mu_{o} I }{2 \pi d}$, where $I$ is the current through. Magnetic fields due to currents in wires - Practical Physics practicalphysics.org/magnetic-fields-due-currents-wires.html Magnetic fields due to currents in wires. This collection of experiments is designed for students to do themselves and so gain experience of the phenomenon of ... PHY214 - Magnetic Fields Due To Currents https://phy214uhart.wikispaces.com/Magnetic+Fields+Due+To+Currents "Leads or //wires// that are used in the //magnet// bore during Magnetic Resonance Imaging (MRI) procedures, should not form large-radius wire loops. Electric Currents and Magnetic Fields - Boundless https://www.boundless.com › ... › Magnetism › Magnetism and Magnetic Fields Each segment of current produces a magnetic field like that of a long straight wire, and the total field of any shape current is the vector sum of the fields due to ... Magnetic field of a wire https://www.pa.msu.edu/courses/1997spring/PHY232/lectures/ampereslaw/wire.html A long straight wire carrying a current is the simplest example of a moving ... The direction of the magnetic field due to moving charges will also depend on the ... Magnetic field - Wikipedia https://en.wikipedia.org/wiki/Magnetic_field Jump to Magnetic field due to moving charges and electric currents - Magnetic field lines form in concentric circles around a cylindrical current-carrying conductor, such as a length of wire. The direction of such a magnetic field can be determined by using the "right hand grip rule" (see figure at right). The strength of the magnetic field decreases with distance from the wire.
