I. Magnets
... º This causes the material to become magnetized to create a magnet. º The strength of the magnetic field inside the material prevents the domains from changing. º Permanent magnets can lose their magnetism if heated or dropped enough. Can a Pole Be Isolated? º What happens if a magnet is broken in h ...
... º This causes the material to become magnetized to create a magnet. º The strength of the magnetic field inside the material prevents the domains from changing. º Permanent magnets can lose their magnetism if heated or dropped enough. Can a Pole Be Isolated? º What happens if a magnet is broken in h ...
22.1,2,3,4,5,6
... Determining the Polarity of the Induced Emf 1.Determine whether the magnetic flux that penetrates a coil is increasing or decreasing. 2.Find what the direction of the induced magnetic field must be so that it can oppose the change in flux by adding to or subtracting from the original field. 3.Havin ...
... Determining the Polarity of the Induced Emf 1.Determine whether the magnetic flux that penetrates a coil is increasing or decreasing. 2.Find what the direction of the induced magnetic field must be so that it can oppose the change in flux by adding to or subtracting from the original field. 3.Havin ...
The Hall Effect
... • In most metals, the charge carriers are electrons and the charge density determined from the Hall effect measurements agrees with calculated values for metals which release a single valence electron and charge density is approximately equal to the number of valence electrons per unit volume. ...
... • In most metals, the charge carriers are electrons and the charge density determined from the Hall effect measurements agrees with calculated values for metals which release a single valence electron and charge density is approximately equal to the number of valence electrons per unit volume. ...
Physics Chapter 22 Notes Induction and alternating current
... Motors are devices that convert electrical energy to mechanical energy. A current of 100 milliamps can be fatal. If the current is larger than about 10 mA, the hand muscles contract and the person may be unable to let go of the wire. Never use electrical appliances near water or with wet hands. Use ...
... Motors are devices that convert electrical energy to mechanical energy. A current of 100 milliamps can be fatal. If the current is larger than about 10 mA, the hand muscles contract and the person may be unable to let go of the wire. Never use electrical appliances near water or with wet hands. Use ...
File
... not toward one or the other poles of the magnet. Instead, the force is directed at right angles to the magnetic field direction. In this case the wire will be forced downwards. If the current is reversed in direction, the force will be in the opposite direction. So in the above situation, if the cur ...
... not toward one or the other poles of the magnet. Instead, the force is directed at right angles to the magnetic field direction. In this case the wire will be forced downwards. If the current is reversed in direction, the force will be in the opposite direction. So in the above situation, if the cur ...
Torque on Current Loop
... v⊥ = v sinφ contributes to circular motion v|| = v cosφ is unchanged ...
... v⊥ = v sinφ contributes to circular motion v|| = v cosφ is unchanged ...
Document
... • Are there any consequences for the early universe? Too early to say. Are cosmological horizons like black hole horizons? Is there a version of the information problem? Most important, this may give us a new lever on applying holography to cosmology. ...
... • Are there any consequences for the early universe? Too early to say. Are cosmological horizons like black hole horizons? Is there a version of the information problem? Most important, this may give us a new lever on applying holography to cosmology. ...
Mag. Fields
... τ IA B •There is a torque on the current loop •Loop flips up to align with B-field •Current reverses when it gets there ...
... τ IA B •There is a torque on the current loop •Loop flips up to align with B-field •Current reverses when it gets there ...
Electromagnetism
... the induced B has the same direction as the external B The induced current receives force from the magnetic field that slows down the motion The magnetic force on the top bar points upward ...
... the induced B has the same direction as the external B The induced current receives force from the magnetic field that slows down the motion The magnetic force on the top bar points upward ...
Electromagnetism
Electromagnetism is a branch of physics which involves the study of the electromagnetic force, a type of physical interaction that occurs between electrically charged particles. The electromagnetic force usually shows electromagnetic fields, such as electric fields, magnetic fields, and light. The electromagnetic force is one of the four fundamental interactions in nature. The other three fundamental interactions are the strong interaction, the weak interaction, and gravitation.The word electromagnetism is a compound form of two Greek terms, ἤλεκτρον, ēlektron, ""amber"", and μαγνῆτις λίθος magnētis lithos, which means ""magnesian stone"", a type of iron ore. The science of electromagnetic phenomena is defined in terms of the electromagnetic force, sometimes called the Lorentz force, which includes both electricity and magnetism as elements of one phenomenon.The electromagnetic force plays a major role in determining the internal properties of most objects encountered in daily life. Ordinary matter takes its form as a result of intermolecular forces between individual molecules in matter. Electrons are bound by electromagnetic wave mechanics into orbitals around atomic nuclei to form atoms, which are the building blocks of molecules. This governs the processes involved in chemistry, which arise from interactions between the electrons of neighboring atoms, which are in turn determined by the interaction between electromagnetic force and the momentum of the electrons.There are numerous mathematical descriptions of the electromagnetic field. In classical electrodynamics, electric fields are described as electric potential and electric current in Ohm's law, magnetic fields are associated with electromagnetic induction and magnetism, and Maxwell's equations describe how electric and magnetic fields are generated and altered by each other and by charges and currents.The theoretical implications of electromagnetism, in particular the establishment of the speed of light based on properties of the ""medium"" of propagation (permeability and permittivity), led to the development of special relativity by Albert Einstein in 1905.Although electromagnetism is considered one of the four fundamental forces, at high energy the weak force and electromagnetism are unified. In the history of the universe, during the quark epoch, the electroweak force split into the electromagnetic and weak forces.