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Microsoft PowerPoint - lecture_18_2014 [Compatibility Mode]
... • Strength of E and B fields vary in strength at a given point with time • E and B fields occur simultaneously and have maxima and minima at SAME time and place – they are “IN PHASE” • EM waves can have a fixed POLARIZATION (plane containing E field) • EM waves can travel in a vacuum • Speed of wave ...
... • Strength of E and B fields vary in strength at a given point with time • E and B fields occur simultaneously and have maxima and minima at SAME time and place – they are “IN PHASE” • EM waves can have a fixed POLARIZATION (plane containing E field) • EM waves can travel in a vacuum • Speed of wave ...
Announcements l Help room hours (1248 BPS) LON-CAPA #7 due Oct. 25
... current loops, which then produce magnetic moments l In most materials, the magnetic effects from the electrons cancel each other out l For some materials this doesn’t happen, and they have magnetic properties ...
... current loops, which then produce magnetic moments l In most materials, the magnetic effects from the electrons cancel each other out l For some materials this doesn’t happen, and they have magnetic properties ...
the rationalized giorgi systemwith absolute volt and ampere
... volt, coulomb and ampere and the forces occuring in the corresponding fields thus assumes a simple form. As an application of the Giorgi system a summary is given of the more important relations and laws of electromagnetism expressed in rationalized Giorgi units (table I). This table is discussed be ...
... volt, coulomb and ampere and the forces occuring in the corresponding fields thus assumes a simple form. As an application of the Giorgi system a summary is given of the more important relations and laws of electromagnetism expressed in rationalized Giorgi units (table I). This table is discussed be ...
Final Exam Review
... in the circuit? 42. What is a series circuit (with resistors)? Draw one that has 3 resistors. If the resistors have resistances of 200, 300, and 400 ohms respectively, what is the equivalent resistance of the circuit? 43. What is a parallel circuit? Draw one that has 3 resistors. If the resistors ha ...
... in the circuit? 42. What is a series circuit (with resistors)? Draw one that has 3 resistors. If the resistors have resistances of 200, 300, and 400 ohms respectively, what is the equivalent resistance of the circuit? 43. What is a parallel circuit? Draw one that has 3 resistors. If the resistors ha ...
Chris Khan 2008 Physics Chapter 23 Changing magnetic fields can
... There is a light bulb in a circuit with a resistance of 12 Ω that consumes 5 W of power. The rod is 1.25 m along and moves to the left with a constant speed of 3.1 m/s. What is B and the force to maintain v? ...
... There is a light bulb in a circuit with a resistance of 12 Ω that consumes 5 W of power. The rod is 1.25 m along and moves to the left with a constant speed of 3.1 m/s. What is B and the force to maintain v? ...
Exam 2 Review
... just memorize how to do the problems, understand what is going on in each step of the problem and why each equation is being used. Another good study technique is to work a problem and then “tweak” somehow (i.e if the magnetic field was changed/orientated how would this affect the problem), and th ...
... just memorize how to do the problems, understand what is going on in each step of the problem and why each equation is being used. Another good study technique is to work a problem and then “tweak” somehow (i.e if the magnetic field was changed/orientated how would this affect the problem), and th ...
Announcements
... l The Greeks started the science of electrostatics (like almost everything else) ...
... l The Greeks started the science of electrostatics (like almost everything else) ...
Electricity and Magnetism
... Ok that’s current carrying wire but what about regular magnets, i.e. not carrying current? ...
... Ok that’s current carrying wire but what about regular magnets, i.e. not carrying current? ...
Document
... magnetic field, it cannot change its speed. Force is maximum when the charge is moving perpendicular to the magnetic field ( = 90). The force is zero if the charge’s velocity is in the same direction as the magnetic field ...
... magnetic field, it cannot change its speed. Force is maximum when the charge is moving perpendicular to the magnetic field ( = 90). The force is zero if the charge’s velocity is in the same direction as the magnetic field ...
AP Physics 1 Exam Cram Sheet
... 44. The first step in any torque problem is to determine the point about which torques are calculated. 45. The work done by any centripetal force is always zero. 46. The mass of a pendulum doesn’t matter. 47. If an object strikes a surface, the normal force exerted on the object must include the for ...
... 44. The first step in any torque problem is to determine the point about which torques are calculated. 45. The work done by any centripetal force is always zero. 46. The mass of a pendulum doesn’t matter. 47. If an object strikes a surface, the normal force exerted on the object must include the for ...
Electric Potential Energy or Potential Difference (Voltage)
... left if we grabbed it and exerted a force on it throughout the distance d. This would mean we would have to do work on the charge. (W = Fed) * If work is done on a charge when it freely moves ...
... left if we grabbed it and exerted a force on it throughout the distance d. This would mean we would have to do work on the charge. (W = Fed) * If work is done on a charge when it freely moves ...
1 Angular momentum and magnetic moment
... missing from equation (2) in comparison to equation (1) results from relativistic factors, but the derivation is rather complex, so we will not present it here. mB = ...
... missing from equation (2) in comparison to equation (1) results from relativistic factors, but the derivation is rather complex, so we will not present it here. mB = ...
Scattering
... The material parameters in the Maxwell equations are macroscopic quantities. Therefore, the electromagnetic fields solved from the equations are some kind of averages of the microscopic field distributions. For example, when we study radio wave propagation in the air we do not solve the fields actin ...
... The material parameters in the Maxwell equations are macroscopic quantities. Therefore, the electromagnetic fields solved from the equations are some kind of averages of the microscopic field distributions. For example, when we study radio wave propagation in the air we do not solve the fields actin ...
Electromagnetic induction in magnetic rod moving with high velocity
... by Michael Faraday in 1831, is the rock on which electrical engineering has been built, while the experimental and theoretical investigation of the electromagnetic effects of moving bodies has been fundamental to the development of modern physical theory in the evolution of aether theories and the e ...
... by Michael Faraday in 1831, is the rock on which electrical engineering has been built, while the experimental and theoretical investigation of the electromagnetic effects of moving bodies has been fundamental to the development of modern physical theory in the evolution of aether theories and the e ...
Induced EMFs and Electric Fields
... • A changing magnetic flux induced an EMF and a current in a conducting loop. • An electric field is created in the conductor as a result of the changing magnetic flux. • The law of electromagnetic induction shows that an electric field is always generated by a changing magnetic flux, even in free ...
... • A changing magnetic flux induced an EMF and a current in a conducting loop. • An electric field is created in the conductor as a result of the changing magnetic flux. • The law of electromagnetic induction shows that an electric field is always generated by a changing magnetic flux, even in free ...
Document
... Two long straight wires are separated by 0.12 m. The wires carry currents of 8.0 amps in opposite directions as shown. Find the magnitude of the net magnetic field at points A and B. Let the current in the left-hand wire be labeled I1 and that in the right-hand wire I2. a. At point A: B1 is up and B ...
... Two long straight wires are separated by 0.12 m. The wires carry currents of 8.0 amps in opposite directions as shown. Find the magnitude of the net magnetic field at points A and B. Let the current in the left-hand wire be labeled I1 and that in the right-hand wire I2. a. At point A: B1 is up and B ...
An experimental set up for detecting Weber`s
... made of two different conducting materials such that they have opposite charges as current carriers or the current carriers has different drift velocities (or both) both). AB-CD is connected to the end of a battery so as to make a closed circuit. PQRS is a piece of wire or a metal plate shaped as sh ...
... made of two different conducting materials such that they have opposite charges as current carriers or the current carriers has different drift velocities (or both) both). AB-CD is connected to the end of a battery so as to make a closed circuit. PQRS is a piece of wire or a metal plate shaped as sh ...
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.