Electromagnetism Forum

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Coil resistance increases from 54 ohms to 8k at 220kHz, why?
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13
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3K
Eventually do magnetic insulators exist?
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3
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Electrical Power Loss Equations Confusion
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3
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2K
Magnetic Dipole Field from a Loop of Wire
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5
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How does electric current flow through a conductor
2
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62
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9K
How does Lenz's law delay coil field collapse in magnetos?
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1
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How is Light (electromagnetic waves) generated by electrons
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9
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Calculating Capacitors for Wave Energy Collectors
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18
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Electric motor: power and RPMs
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17
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6K
Relation between sound intensity and frequency
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1
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8K
Thompson's Absolute Electrometer
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1
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Bar magnet wrapped in electromagnetic coil
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5
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Help clarifying capacitors, dielectrics, E field, potential
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2
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Clarification between electric field and potential energy
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4
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Why is there reverse current in diode equation?
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7
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2K
General questions with currents
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8
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Ideal gas pressure from Maxwell-Boltzmann distribution
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4
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3K
Why Can't a Photon Be Completely Absorbed by a Free Electron?
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11
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3K
Electric field of a point charge above a plane conductor
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5
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2K
How does a battery push charges? Potential difference?
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4
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3K
Magnetic alignment of steel question
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2
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Magnetic levitated electric wire
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1
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1K
Does there exist any electric field inside a charged conductor?
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9
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2K
Discover the Power of Magnetic Locks: 650-1000 lbs of Force
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40
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6K
About uniform electric field between parallel plates
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7
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2K
Humidity & Discharge: Molecular Mechanism & Role of Polarity
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15
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4K
Propagation of EM Waves in metamaterials
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1
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1K
Book Hunt: Statistical Treatment of Macroscopic Maxwell Eqns
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2
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2K
Electric/Magnetic field Inverse square
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5
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2K
Electrostatics/Magnetostatics - E,D,P and B,H,M
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1
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2K
Calculation of temperature of a current-carrying wire
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2
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3K
Induced Magnetic Field: Moving Arbitrary Conductors in Nonuniform Fields
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1
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1K
Photoelectric effect : retarding potential with back current
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1
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4K
Potential due to a uniformly charged flat disk
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9
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2K
Dielectric tensor in an isotropic media
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1
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1K
What do you mean by force "between" two charges?
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7
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1K
Curl of the Magnetic Field of an Infinite Wire
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3
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4K
Why don't I hear beats when singers or instruments play the same note?
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10
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2K
Why a E field cannot hold a charge in space?
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6
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1K
Coulomb's law without a pure inverse square relationship?
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4
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2K
Electric or magnetic field pulse generetor
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16
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2K
Calculating Induced Electric field
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4
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1K
Electric Element Voltage Specifications?
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8
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5K
Does the Lorentz Force Affect Both the Wire and Loop in a Current Loop Setup?
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9
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3K
Physical degrees of freedom of an Electromagnetic field
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4
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5K
Does an electromagnetic shield reflect?
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4
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2K
Total energy of a shell charge
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5
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2K
Electric field by continuous charge distributions.
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2
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1K
Confusion over electric field inside a charged shell
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6
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4K
Why Does Charge Only Distribute on the Outer Surface of a Conducting Shell?
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3
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2K
Induced charge density -- non-zero potential case
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2
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2K
Is Work Done by a Voltage Source Positive or Negative When Current Opposes EMF?
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4
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2K
Neodymium magnet partial shielding
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8
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3K
Bull charging and you charge the bull
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40
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4K
Can one cathode transfer electrons to multiple anodes
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6
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2K
How do changing magnetic fields affect the speed of motors?
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29
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4K
Electric field due to plane of charge
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5
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3K
Thermal resistance without area
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5
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3K
The KE of an electron accelerated by an electric field
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1
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2K
What is the Mistake in My Electric Potential Problem Calculation?
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1
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952
What does Griffith mean by this hint? [Electrodynamics]
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1
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2K
Plasma arc with multiple electrodes
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1
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1K
Cherenkov Radiation and Non-Dielectric Materials
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1
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1K
Can the presence of a field be detected w/o any charge?
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12
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2K
Fluid that emits light when applied voltage, got tips?
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2
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1K
Looking for guidance on electrical impedance
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2
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951
Estimating # of photons/electron from magnetron.
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2
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1K
Change in direction of electric field on conductor surface
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18
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3K
Do ferromagnetic materials do "spatial averaging"?
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2
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1K
Electrical Potential Energy and Electric Potential
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2
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1K
Solutions of wave equation but not Maxwell equations
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1
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2K
Does a battery exert energy keeping a capacitor charged?
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44
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5K
What is the difference btwn positive and negative electrodes
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1
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4K
Function of the Electromagnetic spectrum
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7
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2K
Maxwell eqs. - integral formulation in dynamics
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16
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2K
X-ray tube flux and my experimental test setup
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2
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2K
The direction of electric dipole moment of water molecule
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7
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4K
Inductor leading lagging voltage-current
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2
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2K
Thought experiment: charged particles
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19
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Circular motion of an electron in a magnetic field
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8
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3K
Can Matter-Antimatter Annihilation Yield High Energy Output per Gram?
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3
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3K
Calculating Magnetic Field Strength from FFT
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10
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3K
Charge accumulation for in series batteries
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6
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3K
The functional form for dependence of force on Current?
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4
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1K
Capacitance of parallel plate capacitor separated by
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3
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1K
Can prisms separate out radio and gamma rays?
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3
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2K
Electroplating - radioactive materials in my drawer?
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10
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2K
Magnetic field due to electron?
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4
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1K
How to calculate the voltage needed to create a plasma
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11
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8K
Modelling eddy currents in a pendulum
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2
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2K
Is the Energy of Gamma Rays and Radio Waves Equivalent with Equal Amplitudes?
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19
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2K
Why can't we define a kg as a multiple of the electron mass
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7
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2K
Interaction between a neutral atom and an external magnetic field
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2
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2K
Can a magnet have more push force than it weighs?
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9
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2K
Does a wire loops' magnetic field affect it's current?
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1
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1K
How do you calculate the force between two magnetic dipoles?
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5
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5K
Electric field of a moving charge?
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3
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2K
Can't we use dq/dt in RC discharge?
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3
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2K
Is electric field always 0 if potential at a point is 0?
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2
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2K
Are particles accelerated along magnetic field lines?
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7
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2K

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