Spring 2014 - PHYS4202/6202 - E&M II (Dr. Andrei Galiautdinov, UGA) 0
... the Y lines are driven with half the current ("halfselect") required to cause this change. Only the combined B-field generated where the X and Y lines cross is sufficient to change the state; other cores will see only half the needed field ("half-selected"), or none at all. Driving the current throu ...
... the Y lines are driven with half the current ("halfselect") required to cause this change. Only the combined B-field generated where the X and Y lines cross is sufficient to change the state; other cores will see only half the needed field ("half-selected"), or none at all. Driving the current throu ...
my presentation
... same way devices like electric math busters are charged. It has been proposed as a basis universal recharge pad. The pad could power up all gadgets. Another name for the rechargeable pad is wild charge. The device requires a single AC power cord and then can reportedly recharge any device you lay on ...
... same way devices like electric math busters are charged. It has been proposed as a basis universal recharge pad. The pad could power up all gadgets. Another name for the rechargeable pad is wild charge. The device requires a single AC power cord and then can reportedly recharge any device you lay on ...
Spin
... a response you can have) is proportional to the time-dependent field, B. We will see later that this is a consequence of stimulated emmision. 3) By turning off and on the time-varying magnetic field we can rotate the spin vector relative to the laboratory frame, from which it subsequent to turning o ...
... a response you can have) is proportional to the time-dependent field, B. We will see later that this is a consequence of stimulated emmision. 3) By turning off and on the time-varying magnetic field we can rotate the spin vector relative to the laboratory frame, from which it subsequent to turning o ...
How do magnets interact with other
... All physical objects are made up of atoms. Inside an atom are smaller particles called protons, electrons and neutrons. The protons are positively charged, the electrons are negatively charged, and the neutrons are neutral. While the protons and neutrons reside in the nucleus, or center, of the atom ...
... All physical objects are made up of atoms. Inside an atom are smaller particles called protons, electrons and neutrons. The protons are positively charged, the electrons are negatively charged, and the neutrons are neutral. While the protons and neutrons reside in the nucleus, or center, of the atom ...
Electromagnetic Induction
... The armature is mounted so that it can rotate freely in the field. As the armature turns, the wire loops cut through the magnetic field lines, inducing an EMF. The EMF, commonly called the voltage, developed by the generator depends on the magnetic induction, B, the length of wire rotating in the fi ...
... The armature is mounted so that it can rotate freely in the field. As the armature turns, the wire loops cut through the magnetic field lines, inducing an EMF. The EMF, commonly called the voltage, developed by the generator depends on the magnetic induction, B, the length of wire rotating in the fi ...
Magnetic properties of Materials
... atomic moments. Exchange forces are very large, equivalent to a field on the order of 1000 Tesla, or approximately a 100 million times the strength of the earth's field. ...
... atomic moments. Exchange forces are very large, equivalent to a field on the order of 1000 Tesla, or approximately a 100 million times the strength of the earth's field. ...
Magnetic dipole in a nonuniform magnetic field
... nucleus (again QM needed for deeper understanding) → charged electron creates a current → can be approximated as current-carrying loop → creates magnetic dipole moment Large fraction of magnetic dipole moments of electrons in iron atom align → iron has non-zero magnetic dipole moment Piece of iron: ...
... nucleus (again QM needed for deeper understanding) → charged electron creates a current → can be approximated as current-carrying loop → creates magnetic dipole moment Large fraction of magnetic dipole moments of electrons in iron atom align → iron has non-zero magnetic dipole moment Piece of iron: ...
CHAPTER 29: ELECTROMAGNETIC INDUCTION • So far we have
... So far we have seen that electric charges are the source for both electric and magnetic fields. We have also seen that these fields can exert forces on other electric charges. Charges must be moving in order to create a magnetic field as well as to interact with a magnetic field. In this chapter ...
... So far we have seen that electric charges are the source for both electric and magnetic fields. We have also seen that these fields can exert forces on other electric charges. Charges must be moving in order to create a magnetic field as well as to interact with a magnetic field. In this chapter ...
Is magnetogenetics the new optogenetics?
... expensive, there are few commercially available options, and the coils used to generate the fields produce considerable heat. Similarly, electrophysiological experiments are perilous, because oscillating magnetic fields, by their very nature, induce an electromotive force in conducting electrodes. S ...
... expensive, there are few commercially available options, and the coils used to generate the fields produce considerable heat. Similarly, electrophysiological experiments are perilous, because oscillating magnetic fields, by their very nature, induce an electromotive force in conducting electrodes. S ...
Superconducting magnet
A superconducting magnet is an electromagnet made from coils of superconducting wire. They must be cooled to cryogenic temperatures during operation. In its superconducting state the wire can conduct much larger electric currents than ordinary wire, creating intense magnetic fields. Superconducting magnets can produce greater magnetic fields than all but the strongest electromagnets and can be cheaper to operate because no energy is dissipated as heat in the windings. They are used in MRI machines in hospitals, and in scientific equipment such as NMR spectrometers, mass spectrometers and particle accelerators.