Electromagnetism Forum

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Undergrad Does current decrease inside a wire or does it increase it's velocity?

  • ananunes06
  • · Replies 8 ·
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8

High School How Does a Vacuum Affect Magnetic Fields?

  • pete94857
  • · Replies 8 ·
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8

Graduate Form of energy momentum tensor of matter in EM fields

  • Sunny Singh
  • · Replies 2 ·
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2

Undergrad Producing enough force with a Solenoid

  • PLA2820
  • · Replies 2 ·
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2

High School Direction of drift velocity vs direction of current

  • MrBlank
  • · Replies 8 ·
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8

Undergrad Are Maxwell's equations linearly dependent?

  • cianfa72
  • · Replies 13 ·
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13

Undergrad Is current truly a scalar quantity or a tensor?

  • PhysicsEnjoyer31415
  • · Replies 6 ·
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6

Undergrad Help understanding Maxwell's Equations please

  • PhysicsMan68
  • · Replies 11 ·
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11

High School How would a radial component of induced electric field makes flux ≠ 0

  • KnightTheConqueror
  • · Replies 2 ·
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2

High School What happens when electrons flow in two opposite directions in an electrical circuit?

  • Omar Ibrahim
  • · Replies 9 ·
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9

High School The total voltage drop in a series RLC circuit

  • mymodded
  • · Replies 10 ·
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10

High School What is electromotive force? What's its relationship to Voltage?

  • StoicIndieHacker369
  • · Replies 3 ·
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3

High School A question about induced current in LC circuits

  • mymodded
  • · Replies 4 ·
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4

High School Why does a magnet attract metal objects?

  • withoutname
  • · Replies 2 ·
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2

High School Multiple frequency EMFs and capacitors

  • mymodded
  • · Replies 9 ·
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9

Undergrad RF Power Transfer: Halbach vs. Dipole

  • Esquilo
  • · Replies 12 ·
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12

High School Dimensional Spin Inspection

  • south
  • · Replies 2 ·
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2

Undergrad Equality of Gravitational and Electrostatic force

  • PhysicsEnjoyer31415
  • · Replies 10 ·
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10

Undergrad How is Potential Difference Created across a Resistor?

  • Dario56
  • · Replies 21 ·
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21

Undergrad Directional magnetic field

  • Esquilo
  • · Replies 9 ·
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9

Undergrad Only one type of elementary electric charge?

  • south
  • · Replies 10 ·
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10

Undergrad Did Feynman make a mistake in the drawing of moving charges?

  • Jaaanosik
  • · Replies 6 ·
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6

Undergrad Confused about electromotive forces

  • cianfa72
  • · Replies 10 ·
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10

High School How is a magnetic field formed in a space surrounded by one pole?

  • hongseok
  • · Replies 3 ·
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3

High School Initiation and the math behind Arc Discharges

  • akansh_karthik_1
  • · Replies 8 ·
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8

Undergrad Is the Poynting Vector Field the Only Factor in Energy Flow in Circuits?

  • Dario56
  • · Replies 16 ·
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16

Undergrad Plane wave decomposition of the fields of a dipole antenna

  • Spinnor
  • · Replies 11 ·
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11

High School Why do capacitors not discharge everything immediately in LC circuits?

  • mymodded
  • · Replies 15 ·
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15

High School Initial current in an RLC circuit

  • mymodded
  • · Replies 22 ·
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22

Graduate NMR flip angle - angle of nutation

  • Chrysoperla
  • · Replies 2 ·
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2

Undergrad Does displacement current create a magnetic field? And Lorentz force?

  • greypilgrim
  • · Replies 10 ·
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10

Graduate New magnetic field imaging technology with 100 nm resolution

  • Gribkov
  • · Replies 1 ·
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1

High School The voltage between two points

  • dev_maghraby
  • · Replies 11 ·
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11

High School Antenna induction, oscillating circuit generating EM Waves

  • Steels
  • · Replies 6 ·
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6

High School Found a circuit where current is zero across an ohmic device (dV>0)

  • DrBanana
  • · Replies 11 ·
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11

High School Circular motion as a result of the Lorentz force

  • akansh_karthik_1
  • · Replies 11 ·
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11

Graduate Saha Equation In Plasma for Muons

  • STZweig
  • · Replies 0 ·
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0

Undergrad Electric Potential in circuit

  • eyeweyew
  • · Replies 3 ·
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3

Undergrad How Do Time-Varying Currents in Conductors Generate EM Fields and Waves?

  • crocodile_
  • · Replies 3 ·
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3

High School What happens to a photon's energy when it is refracted?

  • maxelcat
  • · Replies 13 ·
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13

Graduate Electron Spin and current-induced magnetic fields

  • atommo
  • · Replies 18 ·
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18

Undergrad Speed of magnetic flux propagation?

  • bhall
  • · Replies 3 ·
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3

High School Understanding the electric field

  • adjurovich
  • · Replies 16 ·
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16

Undergrad Biot Savart law gives us magnetic field strength or magnetic flux density?

  • jsnprt
  • · Replies 1 ·
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1

High School Possible movement of this magnet?

  • abrek
  • · Replies 2 ·
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2

Undergrad Question about Activating Solenoids that are facing each other

  • JayAshby
  • · Replies 1 ·
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1

Undergrad How to calculate the ring resonator radii via Laplace?

  • Leopold89
  • · Replies 0 ·
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0

Undergrad Why charge density of moving dipole is dependent on time?

  • Lokesh
  • · Replies 3 ·
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3

Undergrad Iron core barely boosting field strength

  • canuck123
  • · Replies 43 ·
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43

Undergrad Problem with one of the premises in electrostatic pressure theory

  • physicsissohard
  • · Replies 1 ·
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1

Undergrad Getting the sign right with the work-energy theorem

  • Rick16
  • · Replies 2 ·
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2

Undergrad How Do Eddy Current Dampers Work in Space Applications?

  • Juanda
  • · Replies 4 ·
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4

Undergrad Force between opposing magnets

  • Guineafowl
  • · Replies 7 ·
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7

Undergrad Does Diamagnetism Occur Even in a Constant Magnetic Field?

  • hongseok
  • · Replies 7 ·
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7

Undergrad Qv x B force in electron's proper frame

  • Swamp Thing
  • · Replies 6 ·
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6

Graduate Diamagnetism & levitation of pyrolytic graphite explanation

  • magnetics
  • · Replies 9 ·
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9

Undergrad Can Electromagnetic Levitation Make an Entire Apparatus Go Skyward?

  • Willb1998
  • · Replies 3 ·
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3

Undergrad Can a permeable but non-magnetic rotor be used in an electric motor?

  • ksh93
  • · Replies 18 ·
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18

Undergrad Effect of Fringe Fields for a Bending (Dipole) Magnet on Field Integral?

  • rubixx14
  • · Replies 0 ·
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0

Undergrad Why Do Some Theorists Claim Cosmic Inflation Dilutes Magnetic Monopoles?

  • GaloisGroup
  • · Replies 5 ·
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5

Undergrad "Strange contradiction" that Maxwell found and resolved

  • Swamp Thing
  • · Replies 7 ·
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7

Undergrad Pushing a rod in a magnetic field

  • Juanda
  • · Replies 15 ·
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15

High School Can charges move without a field? How charges redistribute without it?

  • Aurelius120
  • · Replies 16 ·
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16

Undergrad An electrolytic capacitor charges by itself?

  • Philip Koeck
  • · Replies 3 ·
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3

Undergrad How Does a Magnetic Repulsion Machine Work?

  • Guineafowl
  • · Replies 5 ·
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5

Undergrad Resonant cavity with non-resonant dielectric

  • Leopold89
  • · Replies 10 ·
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10

Undergrad Physical approximation to inverse square law using magnet(s)

  • Swamp Thing
  • · Replies 12 ·
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12

Undergrad Current's Effect on Electrical Arcs

  • flexj624
  • · Replies 9 ·
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9

Undergrad How large is the volume of a photon interacting with matter?

  • johaninumea
  • · Replies 15 ·
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15

Undergrad Deriving the Curl of the Magnetic Field, Role of the Nabla Operator

  • deuteron
  • · Replies 8 ·
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8

Undergrad Maxwell's equations in the presence of matter -- Derivation

  • LeoJakob
  • · Replies 1 ·
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1

Graduate Finding potential of a dipole outside of a sphere

  • nicholasBourbaki
  • · Replies 2 ·
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2

Undergrad Charging Capacitor with one terminal grounded

  • gabriel109
  • · Replies 16 ·
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16

High School Magnetic field produced by an electric current

  • arivel
  • · Replies 5 ·
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5

Undergrad How does the velocity of electrons depend on the voltage across a conductor?

  • DyerMaker
  • · Replies 3 ·
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3

Undergrad Work done by electric field of an irregularly shaped conductor

  • MP1021
  • · Replies 3 ·
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3

High School How can scalars like voltage, impedance, etc. be added like vectors?

  • Aurelius120
  • · Replies 17 ·
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17

Undergrad Gauss' law, method of images, and force induced on conductor plates

  • Mainframes
  • · Replies 17 ·
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17

Undergrad Mutual inductance in a transformer

  • axim
  • · Replies 16 ·
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16

Undergrad How to use geometrical symmetries -- general advice? (Vector potential)

  • LeoJakob
  • · Replies 2 ·
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2

Undergrad Reason for Opposite Signs for Terms in Faraday's Law and Ampere's Law

  • jbrandew
  • · Replies 15 ·
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15

Undergrad Quadrupole moment tensor calculation for ellipsoid

  • LeoJakob
  • · Replies 3 ·
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3

Undergrad Mutual inductance of bifilar winding, vs transmission line parameter

  • Swamp Thing
  • · Replies 4 ·
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4

Undergrad Why Does the Negative Sign Appear in the Vector Potential Equation?

  • deuteron
  • · Replies 3 ·
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3

Undergrad Where is the lost energy in this example?

  • abdossamad2003
  • · Replies 10 ·
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10

High School A Magnetic Misconception on Divergence 0/Closed Field Lines?

  • walkeraj
  • · Replies 3 ·
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3

Undergrad Work to move a point charge from infinity to the centre of a charge distribution

  • LeoJakob
  • · Replies 4 ·
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4

Undergrad Conservation of charge in the Universe

  • Pushoam
  • · Replies 24 ·
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24

Undergrad How do we know that both plates of a capacitor have the same charge?

  • Kashmir
  • · Replies 8 ·
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8

High School How does a compass know that it is in a magnetic field?

  • mister i
  • · Replies 16 ·
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16

Undergrad Do the plates of the capacitor exert a force on each other?

  • abdossamad2003
  • · Replies 21 ·
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21

High School Understanding magnetic flux change during the falling of magnet

  • RED3RED3
  • · Replies 1 ·
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1

High School Changing magnetic polarity of an electromagnet

  • fmorgan2
  • · Replies 10 ·
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10

Undergrad Understanding dissipation of energy in a resistor through the Drude model

  • zenterix
  • · Replies 1 ·
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1

Undergrad Maxwell's equations and the momentum of charge

  • Sirius Q
  • · Replies 12 ·
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12

Undergrad Shielded magnetic loop probe / antennas

  • Swamp Thing
  • · Replies 8 ·
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8

Undergrad Question about the current through a strong insulator

  • abdossamad2003
  • · Replies 2 ·
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2

High School LC resonance with high Q factor, Inductor with non magnetic core

  • StoyanNikolov
  • · Replies 4 ·
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4

High School Inductive Reactance of Solenoid with Solid Metal Core With respect to frquency

  • StoyanNikolov
  • · Replies 5 ·
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5

Undergrad Question about Field Strength of Solenoid Positioned Near a Magnet

  • JayAshby
  • · Replies 9 ·
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9