Today • Questions re: Magnetism problems 2 • HW: Magnetism
... Of note is that, by filling the empty solenoid with an iron core, the magnetic field strength is increased (this is shown in the diagram with magnetic field lines that are greater in both number and density). Also, notice in the equation for B that the Iron Core introduces a constant k (this is refe ...
... Of note is that, by filling the empty solenoid with an iron core, the magnetic field strength is increased (this is shown in the diagram with magnetic field lines that are greater in both number and density). Also, notice in the equation for B that the Iron Core introduces a constant k (this is refe ...
Define and Explain Electromagnetic Induction
... Note that this induced emf is indistinguishable from that of a battery and that the current is still just the rate of the motion of charges; therefore, Ohm's law and other relationships for currents in wires are still valid. Lenz's law The direction of the induced current can be found from Lenz's l ...
... Note that this induced emf is indistinguishable from that of a battery and that the current is still just the rate of the motion of charges; therefore, Ohm's law and other relationships for currents in wires are still valid. Lenz's law The direction of the induced current can be found from Lenz's l ...
Topic 13: Magnetism
... have been studied. Since magnetism is caused by charges in motion, atomic charge movement or charges drifting down a wire can explain magnetism’s presence. If students do simple demonstrations or experiments, the interconnection of moving electric charge and magnetism can be observed. The electric a ...
... have been studied. Since magnetism is caused by charges in motion, atomic charge movement or charges drifting down a wire can explain magnetism’s presence. If students do simple demonstrations or experiments, the interconnection of moving electric charge and magnetism can be observed. The electric a ...
Slide 1
... The electromagnetic radiation from an explosion (especially a nuclear explosion) or an intensely fluctuating magnetic field caused by Compton-recoil electrons and photoelectrons from photons scattered in the materials of the electronic or explosive device or in a surrounding medium. The resulting ...
... The electromagnetic radiation from an explosion (especially a nuclear explosion) or an intensely fluctuating magnetic field caused by Compton-recoil electrons and photoelectrons from photons scattered in the materials of the electronic or explosive device or in a surrounding medium. The resulting ...
Lecture 26 Chapter 32 Magnetism of Matter
... dipole moment from spin and orbital dipole moments of its electrons – Atomic dipole moments are randomly oriented so material has no net magnetic field – If Bext present, partially align the atomic dipole moments giving the material a net B field in the direction of Bext – The dipole alignment and t ...
... dipole moment from spin and orbital dipole moments of its electrons – Atomic dipole moments are randomly oriented so material has no net magnetic field – If Bext present, partially align the atomic dipole moments giving the material a net B field in the direction of Bext – The dipole alignment and t ...
Electromagnetic Induction PowerPoint
... Motors are devices that convert electrical energy into mechanical energy ...
... Motors are devices that convert electrical energy into mechanical energy ...
Magnets - mrzimmerman.org
... • The ancient Greeks knew that the lodestone or magnetite attracted iron towards it. It is known that the Vikings used a lodestone to navigate. Later at the end of the twelfth century Europeans were using this simple compass to aid navigation. ...
... • The ancient Greeks knew that the lodestone or magnetite attracted iron towards it. It is known that the Vikings used a lodestone to navigate. Later at the end of the twelfth century Europeans were using this simple compass to aid navigation. ...
Lesson Sheet
... André Ampere followed up on this discovery and found that two parallel wires carrying electric currents running the same direction attracted each other. This observation led to the creation of a solenoid or coil as shown in Figure 1. In the solenoid, the magnetic field created by a loop of wire carr ...
... André Ampere followed up on this discovery and found that two parallel wires carrying electric currents running the same direction attracted each other. This observation led to the creation of a solenoid or coil as shown in Figure 1. In the solenoid, the magnetic field created by a loop of wire carr ...
13.3 Oersted`s Discovery
... • (b) The magnetic field lines are not as pronounced farther from the conductor, indicating that the strength of the magnetic field is weaker at greater distances from the conductor. • (c) The right-hand rule for straight conductors provides an adequate description of the shape and orientation of th ...
... • (b) The magnetic field lines are not as pronounced farther from the conductor, indicating that the strength of the magnetic field is weaker at greater distances from the conductor. • (c) The right-hand rule for straight conductors provides an adequate description of the shape and orientation of th ...
Ferrofluid
A ferrofluid (portmanteau of ferromagnetic and fluid) is a liquid that becomes strongly magnetized in the presence of a magnetic field.Ferrofluid was invented in 1963 by NASA's Steve Papell as a liquid rocket fuel that could be drawn toward a pump inlet in a weightless environment by applying a magnetic field.Ferrofluids are colloidal liquids made of nanoscale ferromagnetic, or ferrimagnetic, particles suspended in a carrier fluid (usually an organic solvent or water). Each tiny particle is thoroughly coated with a surfactant to inhibit clumping. Large ferromagnetic particles can be ripped out of the homogeneous colloidal mixture, forming a separate clump of magnetic dust when exposed to strong magnetic fields. The magnetic attraction of nanoparticles is weak enough that the surfactant's Van der Waals force is sufficient to prevent magnetic clumping or agglomeration. Ferrofluids usually do not retain magnetization in the absence of an externally applied field and thus are often classified as ""superparamagnets"" rather than ferromagnets.The difference between ferrofluids and magnetorheological fluids (MR fluids) is the size of the particles. The particles in a ferrofluid primarily consist of nanoparticles which are suspended by Brownian motion and generally will not settle under normal conditions. MR fluid particles primarily consist of micrometre-scale particles which are too heavy for Brownian motion to keep them suspended, and thus will settle over time because of the inherent density difference between the particle and its carrier fluid. These two fluids have very different applications as a result.