Disputes exist in Electromagnetic Induction
... Thirdly, physics essence? If Lorentz Magnetic Force is the physical natural of electromagnetic induction, it is obvious that Lenz’s Law and Faraday’s Law are just the physical phenomenon of electromagnetic induction; if Lorentz Magnetic Force is the physical reason of electromagnetic induction, Maxw ...
... Thirdly, physics essence? If Lorentz Magnetic Force is the physical natural of electromagnetic induction, it is obvious that Lenz’s Law and Faraday’s Law are just the physical phenomenon of electromagnetic induction; if Lorentz Magnetic Force is the physical reason of electromagnetic induction, Maxw ...
Experiment: Testing A Variety of Objects for Magnetic Attraction
... If a magnetic piece of steel rod is cut into smaller pieces, each piece is a magnet with a N or a S pole. Therefore a magnet can be said to be made of lots of "tiny" magnets all lined up with their N poles pointing in the same direction. At the ends, the "free" poles of the "tiny" magnets repel each ...
... If a magnetic piece of steel rod is cut into smaller pieces, each piece is a magnet with a N or a S pole. Therefore a magnet can be said to be made of lots of "tiny" magnets all lined up with their N poles pointing in the same direction. At the ends, the "free" poles of the "tiny" magnets repel each ...
IX Maxwell Equations and Electromagnetic waves
... the electric field through the rectangle of Fig. 34-7 is directed as shown. Recall that at the chosen instant, the magnetic field in Fig. 34-6 is decreasing. Because the two fields are in phase, the electric field in Fig. 34-7 must also be decreasing, and so must the electric flux E through the rect ...
... the electric field through the rectangle of Fig. 34-7 is directed as shown. Recall that at the chosen instant, the magnetic field in Fig. 34-6 is decreasing. Because the two fields are in phase, the electric field in Fig. 34-7 must also be decreasing, and so must the electric flux E through the rect ...
The net magnetic field
... The magnetic field is in the plane of the loop and parallel to two sides. If the loop has a width a, a height b, and a current I, then the force on each of the left and right sides is F = IbB. The other sides experience no force because the field is parallel to the current in those sides. Simulation ...
... The magnetic field is in the plane of the loop and parallel to two sides. If the loop has a width a, a height b, and a current I, then the force on each of the left and right sides is F = IbB. The other sides experience no force because the field is parallel to the current in those sides. Simulation ...
Lab-24-(Charged Particles and Magnetic Fields)
... The Challenges: The challenges listed in the following sections appear on the main menu of the CP program. Select the appropriate letter to begin each challenge. The CP program is keyboard oriented. Your mouse does not work. Watch the menu at the bottom of each screen for keys to use. Check the pane ...
... The Challenges: The challenges listed in the following sections appear on the main menu of the CP program. Select the appropriate letter to begin each challenge. The CP program is keyboard oriented. Your mouse does not work. Watch the menu at the bottom of each screen for keys to use. Check the pane ...
Lecture 10 Induction and Inductance Ch. 30
... to swing across a magnet gap cutting magnetic lines of flux. Note that when the copper plate is immersed entirely in the magnet no eddy currents form. ...
... to swing across a magnet gap cutting magnetic lines of flux. Note that when the copper plate is immersed entirely in the magnet no eddy currents form. ...
Chapter 30 - Sources of Magnetic Fields
... The changing direction of the magnetic field changes the direction of the magnetic moments in the material and thus, requires energy. This energy is converted into heat energy and is directly related to the area of the “hysteresis” curve. Problem: Draw a hyteresis curve for a material that 1) could ...
... The changing direction of the magnetic field changes the direction of the magnetic moments in the material and thus, requires energy. This energy is converted into heat energy and is directly related to the area of the “hysteresis” curve. Problem: Draw a hyteresis curve for a material that 1) could ...
qualifying_exam_2
... relationship between retention times as a function of field strength. Pure iron saturates at much higher flux densities than were used in these experiments, leaving room for further investigation. I am also prepared to research the magnetic moment formulation described in this paper. In other words, ...
... relationship between retention times as a function of field strength. Pure iron saturates at much higher flux densities than were used in these experiments, leaving room for further investigation. I am also prepared to research the magnetic moment formulation described in this paper. In other words, ...
Chapter 20 Induction
... plane of the drawing and is increasing. What is the direction of the electric force on a positive point charge placed at point a? (it must produce a current that produces a B field that opposes the change of the original changing flux) – imagine a wire loop with radius r ...
... plane of the drawing and is increasing. What is the direction of the electric force on a positive point charge placed at point a? (it must produce a current that produces a B field that opposes the change of the original changing flux) – imagine a wire loop with radius r ...
Magnetic field
A magnetic field is the magnetic effect of electric currents and magnetic materials. The magnetic field at any given point is specified by both a direction and a magnitude (or strength); as such it is a vector field. The term is used for two distinct but closely related fields denoted by the symbols B and H, where H is measured in units of amperes per meter (symbol: A·m−1 or A/m) in the SI. B is measured in teslas (symbol:T) and newtons per meter per ampere (symbol: N·m−1·A−1 or N/(m·A)) in the SI. B is most commonly defined in terms of the Lorentz force it exerts on moving electric charges.Magnetic fields can be produced by moving electric charges and the intrinsic magnetic moments of elementary particles associated with a fundamental quantum property, their spin. In special relativity, electric and magnetic fields are two interrelated aspects of a single object, called the electromagnetic tensor; the split of this tensor into electric and magnetic fields depends on the relative velocity of the observer and charge. In quantum physics, the electromagnetic field is quantized and electromagnetic interactions result from the exchange of photons.In everyday life, magnetic fields are most often encountered as a force created by permanent magnets, which pull on ferromagnetic materials such as iron, cobalt, or nickel, and attract or repel other magnets. Magnetic fields are widely used throughout modern technology, particularly in electrical engineering and electromechanics. The Earth produces its own magnetic field, which is important in navigation, and it shields the Earth's atmosphere from solar wind. Rotating magnetic fields are used in both electric motors and generators. Magnetic forces give information about the charge carriers in a material through the Hall effect. The interaction of magnetic fields in electric devices such as transformers is studied in the discipline of magnetic circuits.