DC_Machines_week_4
... current IA in the machine A constant depending on the construction of the machine The torque on the armature of a real machine =the number of conductors Z x the torque on each conductor ...
... current IA in the machine A constant depending on the construction of the machine The torque on the armature of a real machine =the number of conductors Z x the torque on each conductor ...
The direction of the magnetic field B at any location
... Only those particles having speed v pass un-deflected through the mutually perpendicular electric and magnetic fields. The magnetic force exerted on particles moving at speeds greater than this is stronger than the electric force, and the particles are deflected upward. Those moving at speeds less ...
... Only those particles having speed v pass un-deflected through the mutually perpendicular electric and magnetic fields. The magnetic force exerted on particles moving at speeds greater than this is stronger than the electric force, and the particles are deflected upward. Those moving at speeds less ...
Generally Covariant Relativistic Anisotropic Magnetohydrodynamics
... predicts different equations of state for parallel and perpendicular pressure. Earlier generalizations of CGL theory onto the case of relativistic velocities and temperatures were obtained by the direct application of the covariance principle [3, 4] with some guess of the state equation, or by consi ...
... predicts different equations of state for parallel and perpendicular pressure. Earlier generalizations of CGL theory onto the case of relativistic velocities and temperatures were obtained by the direct application of the covariance principle [3, 4] with some guess of the state equation, or by consi ...
Module P4.4 Electromagnetic induction
... approaching magnet? Would the forces differ if the magnet were moving away from the coil? ...
... approaching magnet? Would the forces differ if the magnet were moving away from the coil? ...
Methods of Calculating Forces on Rigid, Linear Magnetic Media
... when applying the Lorentz force law a charge inside a macroscopic medium, the appropriate macroscopic average of the microscopic magnetic field is indeed the macroscopic field B. This insight is affirmed in sec. 8.2 of [46], and sec. 22.1.1 of [47], We therefore expect that other methods of calculating ...
... when applying the Lorentz force law a charge inside a macroscopic medium, the appropriate macroscopic average of the microscopic magnetic field is indeed the macroscopic field B. This insight is affirmed in sec. 8.2 of [46], and sec. 22.1.1 of [47], We therefore expect that other methods of calculating ...
OPTICAL PUMPING OF RUBIDIUM
... atomic physics. It is not likely that you will have time to study all the possible experiments that this instrument is capable of paforming, but you should have ample opportunity to explore many interesting phenomena. The apparatus has deceptively simple components, yet it is capable of exploring ve ...
... atomic physics. It is not likely that you will have time to study all the possible experiments that this instrument is capable of paforming, but you should have ample opportunity to explore many interesting phenomena. The apparatus has deceptively simple components, yet it is capable of exploring ve ...
The physical origin of NMR - diss.fu
... to low molecular weight (< 1 kD) molecules, the magnitude of T1 and T2 are identical. However, at approximately τc = 10-9 s the T1 curve inverts to become larger than T2 for an operating frequency, wo = 600 MHz common for protein NMR. Since proteins possess τc > 10-9 s, the decay of magnetization is ...
... to low molecular weight (< 1 kD) molecules, the magnitude of T1 and T2 are identical. However, at approximately τc = 10-9 s the T1 curve inverts to become larger than T2 for an operating frequency, wo = 600 MHz common for protein NMR. Since proteins possess τc > 10-9 s, the decay of magnetization is ...
Electromagnet
An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. Electromagnets usually consist of a large number of closely spaced turns of wire that create the magnetic field. The wire turns are often wound around a magnetic core made from a ferromagnetic or ferrimagnetic material such as iron; the magnetic core concentrates the magnetic flux and makes a more powerful magnet.The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field.Electromagnets are widely used as components of other electrical devices, such as motors, generators, relays, loudspeakers, hard disks, MRI machines, scientific instruments, and magnetic separation equipment. Electromagnets are also employed in industry for picking up and moving heavy iron objects such as scrap iron and steel.