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Graduate How to define ##\nabla \cdot D ## at the interface between dielectrics

  • coquelicot
  • · Replies 4 ·
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4

Undergrad Coil Around A Tube - Iron Cylinder Inside Tube - How Many Turns Needed?

  • Mahonroy
  • · Replies 27 ·
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27

Graduate Why electromagnetic tensor (Faraday 2-form) is exact? (and not closed)

  • phoenix95
  • · Replies 3 ·
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3

High School Can we say that a charged balloon has a center of charge?

  • Lotto
  • · Replies 5 ·
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5

Undergrad Vector Potential Multipole Expansion

  • physwiz222
  • · Replies 8 ·
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8

High School Can a wire be called a resistor?

  • Additya
  • · Replies 7 ·
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7

Graduate Is the mass of the electron constant?

  • Henry_F
  • · Replies 32 ·
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32

Undergrad Is there such a thing as an active diamagnet?

  • cuallito
  • · Replies 2 ·
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2

High School Decompose the E field into conservative and non-conservative parts

  • alan123hk
  • · Replies 64 ·
3
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64

High School What's "Coulomb's law but ##F## converges as ##r\rightarrow##0" called?

  • not my name
  • · Replies 8 ·
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8

Graduate PPMT, Magnetic Flux Switch, electro-permanent magnet generator

  • artis
  • · Replies 8 ·
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8

Undergrad Questions about a Conductor in an Electric Field

  • Neitrino
  • · Replies 13 ·
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13

High School Can a rocket flame be controlled by a magnetic field?

  • Ahmad Sadek
  • · Replies 28 ·
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28

Undergrad Deriving expression for resistance in terms of current density

  • spindecide
  • · Replies 7 ·
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7

High School Voltage gradient distortion in Copper when part is over a magnet

  • Dc2LightTech
  • · Replies 8 ·
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8

Graduate Formula for force between two sheets of aluminum foil under voltage

  • andymag
  • · Replies 10 ·
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10

Undergrad Do volume integrals involve bounding surfaces?

  • yucheng
  • · Replies 14 ·
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14

Graduate Electric field within a battery

  • etotheipi
  • · Replies 51 ·
2
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51

Undergrad Faraday's Law Equation: Derivative vs Delta

  • ManfredArcane
  • · Replies 2 ·
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2

Undergrad Induced electric fields and induced magnetic fields confusion

  • vish22
  • · Replies 9 ·
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9

Undergrad The electric field inside and outside of a dielectric

  • Pushoam
  • · Replies 6 ·
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6

Graduate U(1) invariance of classical electromagnetism

  • dextercioby
  • · Replies 29 ·
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29

Graduate Exploring the Electric Field of a Moving Charged Spherical Shell

  • Povel
  • · Replies 14 ·
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14

High School Is there some electrical charge that is neither positive nor negative?

  • ElectroMaster88
  • · Replies 11 ·
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11

High School Understanding Lewin's Circuit Paradox: Explained Simply and Clearly

  • alan123hk
  • · Replies 24 ·
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24

High School Uniform charge distribution in a conductor

  • saadm
  • · Replies 5 ·
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5

Undergrad Why is the electric field within a conducting sphere 0?

  • jackrc11
  • · Replies 11 ·
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11

High School Magnetic fields attracting two disc-shaped magnets

  • PlanTer254
  • · Replies 11 ·
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11

Graduate Rotating a spherical conductor in an Electric field

  • tim9000
  • · Replies 20 ·
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20

Undergrad How does a rotating magnet create levitation?

  • sergiokapone
  • · Replies 1 ·
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1

High School What magnetic fields can this hollow rod shield?

  • Lotto
  • · Replies 13 ·
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13

High School Static Point Charge Should Have Zero Effect

  • bryanso
  • · Replies 18 ·
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18

High School Voltage & Current: Explaining the Basics for Beginners

  • hendrix7
  • · Replies 11 ·
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11

Undergrad What happens to resistance of tap water as voltage is increased?

  • kma
  • · Replies 22 ·
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22

Undergrad Why Do I Get Electrically Shocked by Metal Objects?

  • planck999
  • · Replies 4 ·
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4

Undergrad Why is the electric field in y direction in a TE guided wave?

  • happyparticle
  • · Replies 5 ·
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5

Undergrad How do I visualize the magnetic field?

  • Sketchy
  • · Replies 1 ·
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1

Undergrad Parameters of the rough surface (for electromagnetic scattering)

  • Ahmed123
  • · Replies 2 ·
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2

Undergrad Fundamental - Magnetic fields generated by moving electrons

  • MrPidooma
  • · Replies 23 ·
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23

Undergrad How Does a Vibrating Sample Magnetometer Calculate Magnetic Moment?

  • no_einstein
  • · Replies 2 ·
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2

Undergrad Where is this term coming from?

  • bigmike94
  • · Replies 5 ·
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5

Undergrad Dielectric constant, dispersion and response of the medium

  • riharenda009
  • · Replies 1 ·
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1

Undergrad Can the A and φ potentials be fixed in a region of space?

  • cuallito
  • · Replies 14 ·
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14

Undergrad A and ϕ inside a Faraday cage?

  • cuallito
  • · Replies 2 ·
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2

High School Method of images and spherical coordinates

  • josephsanders
  • · Replies 4 ·
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4

High School Does a Faraday Cage trap EMF inside and increase exposure?

  • A13579
  • · Replies 5 ·
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5

Undergrad Faraday cage made of a real conductor

  • cuallito
  • · Replies 3 ·
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3

Undergrad Can I send an electromagnetic wave to a specific point?

  • nlopwer
  • · Replies 3 ·
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3

Undergrad Where do discontinuities in the electromagnetic field occur?

  • cuallito
  • · Replies 2 ·
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2

Undergrad Are EM signals also analytical backwards in time?

  • greypilgrim
  • · Replies 6 ·
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6

Undergrad Homopolar generator question: Magnetic “wake”

  • JoviG
  • · Replies 7 ·
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7

High School Doppler effect on electromagnetic waves in a car

  • abdossamad2003
  • · Replies 6 ·
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6

Undergrad Can Current Density Static Create an Effective Electromagnetic Shield?

  • cuallito
  • · Replies 3 ·
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3

Graduate A question about current density in finite element analysis

  • JH_1870
  • · Replies 2 ·
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2

Graduate Relationship between magnetic potential and current density in Maxwell

  • JH_1870
  • · Replies 2 ·
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2

Undergrad Does the electrical force also respect the Kepler Laws?

  • jaumzaum
  • · Replies 15 ·
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15

Undergrad Can trains use permanent magnets to be propelled?

  • Suekdccia
  • · Replies 3 ·
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3

Undergrad Does the speed of light imply ....

  • finney
  • · Replies 9 ·
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9

Undergrad Some questions about how electrical transformers work

  • saadm
  • · Replies 9 ·
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9

Undergrad Biological examples of a Biot-Savart law in magnetostatics?

  • MarkTheQuark
  • · Replies 5 ·
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5

High School Phase Difference of Current & Voltage: Capacitors, Inductors & Complex Numbers

  • shivakumar
  • · Replies 8 ·
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8

Graduate Puzzled about Section 3.12 of Jackson's E&M book

  • ForgetfulPhysicist
  • · Replies 18 ·
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18

Undergrad How Do Magnetic Forces Differ Between Magnets and Wires?

  • nemuritai
  • · Replies 1 ·
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1

Undergrad Question about the motion of a charged particle

  • rehab
  • · Replies 14 ·
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14

Undergrad Tangential electric force at a surface

  • josephsanders
  • · Replies 3 ·
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3

Undergrad Question regarding Laplace's Equation for regions with charges

  • Harikesh_33
  • · Replies 11 ·
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11

Graduate Approximating integrals of Bessel functions

  • pherytic
  • · Replies 2 ·
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2

Undergrad Query on Electromagnetic Theory (Dielectric Boundary Conditions)

  • warhammer
  • · Replies 3 ·
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3

Undergrad Is electromotive force always equal to potential difference?

  • Ahmed1029
  • · Replies 9 ·
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9

Graduate Power consumed by electron gun

  • rsc9421
  • · Replies 26 ·
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26

Undergrad Why does metal moving though a magnetic field slow down?

  • thedubdude
  • · Replies 17 ·
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17

Undergrad Defining the Forces from Magnetic Fields and Electric Fields

  • physics_nsrg
  • · Replies 4 ·
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4

Undergrad EM Four-Potential and INDUCED Electric Fields

  • LarryS
  • · Replies 10 ·
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10

Undergrad How do I find the Direction of an induced electric field?

  • Ahmed1029
  • · Replies 10 ·
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10

High School What's the reason microwave oven frequencies are at 2.45 Ghz?

  • brajesh
  • · Replies 30 ·
2
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30

Undergrad Is there traction force between moving electrons & copper wire?

  • cairoliu
  • · Replies 6 ·
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6

Undergrad Can visible light cause fluorescence in colorful objects?

  • Awwtumn
  • · Replies 13 ·
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13

Undergrad How Does the Maxwell-Faraday Law Apply to Stealth Magnets and EMF Induction?

  • MS La Moreaux
  • · Replies 27 ·
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27

Undergrad Why can't objects be seen if the wavelength is too long?

  • yosimba2000
  • · Replies 20 ·
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20

High School Direction of Electric Field & Field Due to a Dipole

  • warhammer
  • · Replies 5 ·
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5

High School Calculating Force on an Iron Object with Magnetic Field

  • liquidFuzz
  • · Replies 21 ·
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21

Undergrad Faraday induction in constant B field, with non-conduction wires

  • FFXT
  • · Replies 2 ·
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2

Undergrad Outright understanding L/R inductor time constant

  • abdulbadii
  • · Replies 2 ·
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2

Undergrad Energy of an electromagnetic wave

  • PreposterousUniverse
  • · Replies 15 ·
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15

Undergrad Inductor questions (generate a voltage opposing the source voltage?)

  • annamal
  • · Replies 59 ·
2
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59

Undergrad Magnetic field strength of a stack of magnets

  • xzy922104
  • · Replies 7 ·
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7

Undergrad Can current flow in an open circuit?

  • Salmone
  • · Replies 4 ·
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4

Undergrad What Happens to Ions Generated by a Destat Apparatus?

  • allaroundions
  • · Replies 9 ·
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9

Undergrad Electric Field & Interplay between Coordinate Systems | DJ Griffiths

  • warhammer
  • · Replies 8 ·
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8

Undergrad Two molecules with different polarizability in an EM field

  • Salmone
  • · Replies 4 ·
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4

Undergrad How an induced electric dipole vibrates with EM field

  • Salmone
  • · Replies 10 ·
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10

Undergrad Rayleigh scattering -- What is the true reason for the color of the sky?

  • Salmone
  • · Replies 57 ·
2
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57

Undergrad A smaller cross-sectional area increases the resistance of a conductor?

  • Viona
  • · Replies 7 ·
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7

Undergrad Does Ohm's Law work for Light Bulbs?

  • Albertgauss
  • · Replies 57 ·
2
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57

Undergrad Electric field of a moving charge that's abruptly stopped

  • vish22
  • · Replies 2 ·
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2

Undergrad The Curious Case of The Impotent Magnets

  • theycallmevirgo
  • · Replies 14 ·
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14

Undergrad Can a Core-less Dynamo Really Achieve Double Efficiency?

  • goran d
  • · Replies 3 ·
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3

Undergrad Helmholtz's theorem and charge density

  • Ahmed1029
  • · Replies 2 ·
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2

Insights A Physics Misconception with Gauss’ Law

  • Orodruin
  • · Replies 5 ·
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5

Graduate What Is the Coulomb Gauge in Electromagnetic Theory?

  • Greg Bernhardt
  • · Replies 3 ·
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3