Sep. 28 - Bryn Mawr College
... • Things have charge. This causes things to be attracted to and repelled by other things. This is called the electric force. It is one of four fundamental forces in nature (along with gravity, the weak force, and the strong force). Charge is labeled by q and has units of Coulombs. • Charge flowing t ...
... • Things have charge. This causes things to be attracted to and repelled by other things. This is called the electric force. It is one of four fundamental forces in nature (along with gravity, the weak force, and the strong force). Charge is labeled by q and has units of Coulombs. • Charge flowing t ...
Lecture 6: Pre-reading Light, Photons, and MRI
... wavelength (λ), frequency (f), and wave speed (v) holds true for light, just as it does for all waves. (For light, of course, this equation is often written λf = c, where c is the speed of light.) We will explore many of the interesting wave properties of light a bit later on in the course. The view ...
... wavelength (λ), frequency (f), and wave speed (v) holds true for light, just as it does for all waves. (For light, of course, this equation is often written λf = c, where c is the speed of light.) We will explore many of the interesting wave properties of light a bit later on in the course. The view ...
Magnetic Fields
... a bar magnet (which end is North pole?) and attracts the real bar magnet. Where are the N and S poles for the bar? ...
... a bar magnet (which end is North pole?) and attracts the real bar magnet. Where are the N and S poles for the bar? ...
Electromagnetism - Sterling Public Schools
... Electromagnetism rules • Magnetic fields exist in the region near a conductor when the circuit is closed. • The direction of the field is dependent on the direction of the current in the conductor. ...
... Electromagnetism rules • Magnetic fields exist in the region near a conductor when the circuit is closed. • The direction of the field is dependent on the direction of the current in the conductor. ...
3 – More Electric Fields Questions
... 2. 1km = 100cm, so 1km2 = 1 x 1010cm2. Since there are 600 000 electrons on each square cm, this would give 6 x 1015 electrons on a square km. This would mean the total charge would be 9.6 x 10-4C. 3. 625 000 000 electrons 4. 1.33 x 106 N/C [up] 5. An electron has a charge of 1.6 x 10-19C, so the fo ...
... 2. 1km = 100cm, so 1km2 = 1 x 1010cm2. Since there are 600 000 electrons on each square cm, this would give 6 x 1015 electrons on a square km. This would mean the total charge would be 9.6 x 10-4C. 3. 625 000 000 electrons 4. 1.33 x 106 N/C [up] 5. An electron has a charge of 1.6 x 10-19C, so the fo ...
Lecture #34 Tutorial on electric potential, field, and light
... theory of quantum electrodynamics (QED), referred to the fine-structure constant in these terms: There is a most profound and beautiful question associated with the observed coupling constant, e – the amplitude for a real electron to emit or absorb a real photon. It is a simple number that has been ...
... theory of quantum electrodynamics (QED), referred to the fine-structure constant in these terms: There is a most profound and beautiful question associated with the observed coupling constant, e – the amplitude for a real electron to emit or absorb a real photon. It is a simple number that has been ...
Lecture #21 04/14/05
... Ampere’s Law Generalized •When there is a net current flowing into a region, the charge in the region must be changing, as must the electric field. •By Gauss’s Law, the electric flux must be changing as well •Change in electric flux creates magnetic fields, just like currents do •Displacement curre ...
... Ampere’s Law Generalized •When there is a net current flowing into a region, the charge in the region must be changing, as must the electric field. •By Gauss’s Law, the electric flux must be changing as well •Change in electric flux creates magnetic fields, just like currents do •Displacement curre ...
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.