Electromagnetism Forum

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I Deriving expression for resistance in terms of current density
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1K
A Formula for force between two sheets of aluminum foil under voltage
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10
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1K
I Do volume integrals involve bounding surfaces?
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14
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Electric field within a battery
2
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I Faraday's Law Equation: Derivative vs Delta
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2
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I Induced electric fields and induced magnetic fields confusion
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The electric field inside and outside of a dielectric
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U(1) invariance of classical electromagnetism
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29
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A Exploring the Electric Field of a Moving Charged Spherical Shell
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B Is there some electrical charge that is neither positive nor negative?
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B Understanding Lewin's Circuit Paradox: Explained Simply and Clearly
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24
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B Uniform charge distribution in a conductor
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Why is the electric field within a conducting sphere 0?
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B Magnetic fields attracting two disc-shaped magnets
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11
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Rotating a spherical conductor in an Electric field
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I How does a rotating magnet create levitation?
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866
B Static Point Charge Should Have Zero Effect
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909
I Why is the electric field in y direction in a TE guided wave?
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5
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818
I How do I visualize the magnetic field?
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900
I How Does a Vibrating Sample Magnetometer Calculate Magnetic Moment?
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646
I Where is this term coming from?
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610
I Dielectric constant, dispersion and response of the medium
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765
I Can the A and φ potentials be fixed in a region of space?
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747
I A and ϕ inside a Faraday cage?
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636
B Method of images and spherical coordinates
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803
B Does a Faraday Cage trap EMF inside and increase exposure?
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961
I Faraday cage made of a real conductor
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757
I Can I send an electromagnetic wave to a specific point?
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3
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887
I Where do discontinuities in the electromagnetic field occur?
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715
I Are EM signals also analytical backwards in time?
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765
I Homopolar generator question: Magnetic “wake”
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I Can Current Density Static Create an Effective Electromagnetic Shield?
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968
A A question about current density in finite element analysis
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A Relationship between magnetic potential and current density in Maxwell
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I Some questions about how electrical transformers work
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I Biological examples of a Biot-Savart law in magnetostatics?
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824
B Phase Difference of Current & Voltage: Capacitors, Inductors & Complex Numbers
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8
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A Puzzled about Section 3.12 of Jackson's E&M book
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18
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1K
I Question about the motion of a charged particle
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14
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1K
I Tangential electric force at a surface
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3
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795
I Question regarding Laplace's Equation for regions with charges
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11
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852
A Approximating integrals of Bessel functions
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2
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592
I Is electromotive force always equal to potential difference?
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9
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941
A Power consumed by electron gun
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26
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I Defining the Forces from Magnetic Fields and Electric Fields
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4
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828
I How do I find the Direction of an induced electric field?
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I Is there traction force between moving electrons & copper wire?
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6
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893
I Can visible light cause fluorescence in colorful objects?
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13
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I Maxwell-Faraday Law & Stealth Magnets: Exploring EMF Induction
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I Why can't objects be seen if the wavelength is too long?
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20
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B Calculating Force on an Iron Object with Magnetic Field
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21
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I Faraday induction in constant B field, with non-conduction wires
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695
I Inductor questions (generate a voltage opposing the source voltage?)
2
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59
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I Magnetic field strength of a stack of magnets
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7
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I Can current flow in an open circuit?
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4
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I Electric Field & Interplay between Coordinate Systems | DJ Griffiths
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8
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I Two molecules with different polarizability in an EM field
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I How an induced electric dipole vibrates with EM field
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10
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I Rayleigh scattering -- What is the true reason for the color of the sky?
2
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I A smaller cross-sectional area increases the resistance of a conductor?
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7
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855
I Electric field of a moving charge that's abruptly stopped
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920
I Helmholtz's theorem and charge density
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2
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753
Insights A Physics Misconception with Gauss’ Law
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What Is the Coulomb Gauge in Electromagnetic Theory?
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3
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Ultra high magnetic fields using carbon nanotubes
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B Switch-to-lightbulb wire delay
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5
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I What makes a plasma collisionless?
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1
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730
The difference between diamagnetism and paramagnetism?
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2
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B Are magnetic fields generated through radio frequencies?
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16
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I Can an insulator reflect radiowaves?
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Who defined the positive direction of the magnetic field?
2
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I On the derivation of Child-Langmuir law
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I How could electric susceptibilbility depend on position?
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3
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685
I How to emit 3.2 micrometer wavelength
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12
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999
I Antenna inductance calculation (RFID applications, inductive coupling)
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I Exploring Newton's Third Law in an Imaginary Magnetic Field
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4
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950
I Dipole moment of a cylinder of uniform polarization
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10
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I When does the second uniqueness theorem apply?
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12
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790
I Derivation of the magnetic flux in coaxial cable
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26
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I How does a ferromagnet increase the inductance of an inductor?
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3
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894
I Derivation of induced voltage in loop
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32
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I A question about the Second Uniqueness Theorem in electrostatics
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11
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901
I Molten metal flow due to high currents
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10
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828
I The second uniqueness theorem in electrostatics
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5
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841
I Retarded potential of a moving point charge
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10
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I Electric motor with increased load
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2
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694
I Coulomb's law for steady currents
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10
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961
I Does electron beam in empty space generate magnetic fields?
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7
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A Maxwell equation. Commuting time and spatial derivatives.
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A Calculation of EM fields induced by an antenna in the near field
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I Calculating Total Electric Charge with a Capacitor and Battery
2
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B How does the propagation of light work? How much time does it take?
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6
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794
I Calculation of electric flux on trapezoidal surface
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11
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1K
I Average Magnetic Field Between 2 Conducting Rods
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695
I Force exerted by an iron core electromagnet on a ferrofluid
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A Variation of Energy for Dielectrics (Zangwill's Electrodynamics)
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3
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687
I Electric field is zero in the center of a spherical conductor
2
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I Why is there no induced charge outside of the conductor?
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10
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1K
I Electric field, flux, and conductor questions
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14
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I Trying to derive Gauss' law using a cylindrical surface
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2
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641

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