Electromagnetism Forum

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Insights Symmetry Arguments and the Infinite Wire with a Current
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I Eddy Current Dampers
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I Can a permeable but non-magnetic rotor be used in an electric motor?
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11
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140
I Maxwell says that Div B = 0
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I "Strange contradiction" that Maxwell found and resolved
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125
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[Griffiths Electrodynamics] Finding the electric flux through this quarter cylinder
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A An electrolytic capacitor keeps charging by itself
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9
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152
I An electrolytic capacitor charges by itself?
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3
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1K
I Magnetic repulsion machine
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5
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168
I Resonant cavity with non-resonant dielectric
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10
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232
I Iron core barely boosting field strength
2
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42
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593
I Physical approximation to inverse square law using magnet(s)
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12
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269
I How large is the volume of a photon interacting with matter?
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15
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392
I Maxwell's equations in the presence of matter -- Derivation
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257
A Finding potential of a dipole outside of a sphere
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2
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188
I Charging Capacitor with one terminal grounded
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16
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413
B Magnetic field produced by an electric current
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193
I Work done by electric field of an irregularly shaped conductor
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3
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355
B How can scalars like voltage, impedance, etc. be added like vectors?
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17
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352
I Mutual inductance in a transformer
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I How to use geometrical symmetries -- general advice? (Vector potential)
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2
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176
I Reason for Opposite Signs for Terms in Faraday's Law and Ampere's Law
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15
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595
I Quadrupole moment tensor calculation for ellipsoid
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3
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214
I Mutual inductance of bifilar winding, vs transmission line parameter
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4
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199
I Where is the lost energy in this example?
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10
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459
Inducing EMF Through a Coil: Understanding Flux
6
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191
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14K
I Work to move a point charge from infinity to the centre of a charge distribution
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4
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295
I Conservation of charge in the Universe
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24
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I How do we know that both plates of a capacitor have the same charge?
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8
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947
B Single phase induction motor Torque under increased frequency and Same Current
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284
I Do the plates of the capacitor exert a force on each other?
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21
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489
B Understanding magnetic flux change during the falling of magnet
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242
B Changing magnetic polarity of an electromagnet
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10
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342
I Understanding dissipation of energy in a resistor through the Drude model
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842
I Question about the current through a strong insulator
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2
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293
B LC resonance with high Q factor, Inductor with non magnetic core
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4
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276
B Inductive Reactance of Solenoid with Solid Metal Core With respect to frquency
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5
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335
I Question about Field Strength of Solenoid Positioned Near a Magnet
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9
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346
I Diamagnetism and Lenz's law
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2
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265
I Resistance and specific resistance relationships
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16
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511
B What's the difference between these two curves for AC Generator?
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11
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397
A Ponderomotive force and conservation of momentum
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269
I Capacitor connected to voltage source, vary plate separation
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9
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351
I Structural difference between soft and hard ferromagnets
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4
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478
I Do electric currents depend on the frame of reference?
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5
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318
I Simple electromagnetic wave including delay
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2
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280
B Current-carrying coil and solenoid
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3
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312
I Generating Divergence Equation In Cylindrical Coordinates
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3
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380
I Is this solenoid / permanent magnet configuration possible?
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5
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342
B Can I use this method to charge a metal sphere?
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9
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419
I Alternating current in a perfect conductor
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11
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606
I What causes the unexpected annihilation point in the Magic-Tee configuration?
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15
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541
I Problems in classical electrodynamics: Only for point-like particles?
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1
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351
I Electrical breakdown in air in the presence of a single charge
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3
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417
A Visualising visible light Fluorescence
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6
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446
I Light intensity required to shine a light through an opaque object
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22
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1K
B Definition of ground potential in infinite sheet charge distributions
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A Proving an equation in a book about Periodic Structures
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6
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B Symmetry regarding induced potentials?
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4
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I Looking for knowledge and insight about Magnetohydrodynamics and a simple setup to observe the phenomenon
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386
B Electromagnetic radiation interacting with a magnetic field
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24
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I Permanent Magnetic Dipole in an electromagnetic field
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476
B Direction of magnetic fields
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6
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499
A Magnetization and magnet poles
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10
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I How to Measure the Energy of an Electromagnetic Wave?
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4
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769
I Magnetic field as result of length contraction
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I Which law defines the AC inducing voltage in the inductor?
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25
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924
I Current through U-wire (rail gun): Violation of (naive) conservation of momentum?
2
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A Identifying Magnet Grade for FEMM Simulation: Neodymium Cylinder Magnets
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659
A Electric field of infinite sheet with time dependent charge
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22
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I What causes skin effect in AC currents?
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549
B Measuring electric field vs magnetic field
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I Does B=0 at points out of the plane containing and normal to a point current I?
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8
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556
I Geometry of Magnetic field lines as they approach a magnet pole?
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28
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I When to properly use "voltage"
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25
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906
I Railgun: Significant magnetic field where projectile is?
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8
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B Why can only the electric field (E) be measured?
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23
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912
I Circular loop in uniform magnetic field
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I Is the magnetic field from this current rotationally symmetric?
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A General solution to Laplacian in cylindrical coordinates
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720
I Do you think emissivity of air makes sense?
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I Electricity and Magnetism: Verifying the Inverse Square Law
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3
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666
I Can the Last Maxwell's Equation Explain Polarization of a Wire's Insulator?
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3
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660
B Understanding the Relationship Between i*cos and sin in Circuit Analysis
2
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I Inductance Measurement: Error Due To Series Resistance
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6
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657
I Ampere's Law For Static Magnetic Field
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829
A Voltage and current waves in a transmission line
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I Guiding center motion of charged particles in EM field
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585
B Designing a current sensor for 50mA up to several dozen Amps
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I Power Loss Due to An Eddy Current
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937
I Is the Poynting Vector Field the Only Factor in Energy Flow in Circuits?
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14
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A Green's function for problems involving linear isotropic media
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3
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657
I How is Potential Difference Created across a Resistor?
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4
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905
I Question about Coloumb's law notation and math in two different textbooks
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4
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783
I Faraday cage continuity question
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11
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839
A Why is "method of image current" valid in magnetostatics?
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779
I Why are Maxwell's equations and the Lorentz force "so different"
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I Rate of work done by F on charge carrier with average velocity v
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I Will insulation on electric power lines affect the flow of power?
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B Melting a nail with high currents
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B Coulumb's Law at 1 light year distance
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953

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