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Graduate What is susceptibility in physics?

  • Greg Bernhardt
  • · Replies 1 ·
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1

Graduate Ultra high magnetic fields using carbon nanotubes

  • RGClark
  • · Replies 1 ·
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1

High School Switch-to-lightbulb wire delay

  • underworld
  • · Replies 5 ·
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5

Undergrad Understanding the physics behind a Solenoid Valve

  • jackmrrabbit
  • · Replies 3 ·
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3

Undergrad Propagation of Errors, Ohm's Law

  • Albertgauss
  • · Replies 6 ·
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6

Graduate Clarifying Electrodynamics: Relativity and the Faraday Tensor

  • Arcon
  • · Replies 1 ·
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1

Undergrad What makes a plasma collisionless?

  • Jd1431
  • · Replies 1 ·
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1

Undergrad The difference between diamagnetism and paramagnetism?

  • jeebs
  • · Replies 2 ·
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2

High School Are magnetic fields generated through radio frequencies?

  • bbbl67
  • · Replies 16 ·
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16

Undergrad Laplace's equation in presence of a dipole (perfect or physical)

  • Ahmed1029
  • · Replies 7 ·
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7

Insights How to Model a Magnet Falling Through a Conducting Pipe

  • kuruman
  • · Replies 10 ·
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10

Undergrad Can an insulator reflect radiowaves?

  • garryA
  • · Replies 17 ·
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17

High School Resonance state - Alternating current

  • Guillem_dlc
  • · Replies 23 ·
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23

Undergrad Who defined the positive direction of the magnetic field?

  • Jairo Amaral
  • · Replies 35 ·
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Undergrad On the derivation of Child-Langmuir law

  • elgen
  • · Replies 6 ·
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6

Insights How to Model a Magnet Falling Through a Solenoid

  • kuruman
  • · Replies 10 ·
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10

Undergrad How could electric susceptibilbility depend on position?

  • Ahmed1029
  • · Replies 3 ·
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3

Undergrad How to emit 3.2 micrometer wavelength

  • Vincent L
  • · Replies 12 ·
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12

Undergrad Antenna inductance calculation (RFID applications, inductive coupling)

  • ethanRR
  • · Replies 6 ·
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6

Undergrad Exploring Newton's Third Law in an Imaginary Magnetic Field

  • pays_fan
  • · Replies 4 ·
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4

High School What is the analogy for EM waves traveling in vacuum?

  • Delta2
  • · Replies 42 ·
2
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42

Undergrad Dipole moment of a cylinder of uniform polarization

  • Ahmed1029
  • · Replies 10 ·
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10

Undergrad EM wave propagation: respective phase of E and M field

  • timber1969
  • · Replies 6 ·
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6

Undergrad When does the second uniqueness theorem apply?

  • Ahmed1029
  • · Replies 12 ·
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12

Undergrad Does an inductor always create a back EMF?

  • Jaccobtw
  • · Replies 14 ·
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14

Undergrad Derivation of the magnetic flux in coaxial cable

  • annamal
  • · Replies 26 ·
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26

Undergrad How does a ferromagnet increase the inductance of an inductor?

  • Jaccobtw
  • · Replies 3 ·
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3

Undergrad Are spherical transverse waves exact solutions to Maxwell's equations?

  • Delta2
  • · Replies 1 ·
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1

Undergrad Is E/B = c for spherical EM Wave in Vacuum?

  • LarryS
  • · Replies 10 ·
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10

Undergrad Solving the EM field equations to produce the desired vector field

  • greswd
  • · Replies 8 ·
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8

Undergrad Derivation of induced voltage in loop

  • annamal
  • · Replies 32 ·
2
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32

Undergrad A question about the Second Uniqueness Theorem in electrostatics

  • Ahmed1029
  • · Replies 11 ·
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11

Undergrad Molten metal flow due to high currents

  • avicenna
  • · Replies 10 ·
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10

Undergrad The second uniqueness theorem in electrostatics

  • Ahmed1029
  • · Replies 5 ·
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5

Undergrad Retarded potential of a moving point charge

  • Kashmir
  • · Replies 10 ·
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10

High School Questions on magnets (multiple so I don't spam the forum)

  • Nobody7heGreat
  • · Replies 2 ·
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2

Undergrad Electric motor with increased load

  • annamal
  • · Replies 2 ·
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2

Undergrad Coulomb's law for steady currents

  • Kashmir
  • · Replies 10 ·
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10

Undergrad Exact electrostatic potential of a pure dipole using multipole expansion

  • Ahmed1029
  • · Replies 6 ·
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6

Undergrad Does electron beam in empty space generate magnetic fields?

  • avicenna
  • · Replies 7 ·
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7

Graduate Maxwell equation. Commuting time and spatial derivatives.

  • LagrangeEuler
  • · Replies 1 ·
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1

High School Can you turn a skyscraper into a magnet?

  • Sir John Galt
  • · Replies 5 ·
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5

Graduate Calculation of EM fields induced by an antenna in the near field

  • DC2
  • · Replies 11 ·
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11

Undergrad Calculating Total Electric Charge with a Capacitor and Battery

  • annamal
  • · Replies 42 ·
2
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42

High School How does the propagation of light work? How much time does it take?

  • lordoftheselands
  • · Replies 6 ·
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6

Undergrad Calculation of electric flux on trapezoidal surface

  • annamal
  • · Replies 11 ·
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11

Undergrad Average Magnetic Field Between 2 Conducting Rods

  • Gbl911
  • · Replies 1 ·
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1

Undergrad Force exerted by an iron core electromagnet on a ferrofluid

  • EmeraldPlatypus
  • · Replies 2 ·
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2

Graduate Variation of Energy for Dielectrics (Zangwill's Electrodynamics)

  • pherytic
  • · Replies 3 ·
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3

Undergrad Electric field is zero in the center of a spherical conductor

  • annamal
  • · Replies 44 ·
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44

Undergrad Why is there no induced charge outside of the conductor?

  • annamal
  • · Replies 10 ·
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10

Undergrad Faraday’s law and voltage generation

  • JimH59
  • · Replies 3 ·
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3

Undergrad Electric field, flux, and conductor questions

  • annamal
  • · Replies 14 ·
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14

Undergrad Energy of an electron in an electric circuit

  • Trollfaz
  • · Replies 22 ·
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22

Undergrad Trying to derive Gauss' law using a cylindrical surface

  • annamal
  • · Replies 2 ·
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2

High School Do materials surrounding magnets affect how superconductors levitate?

  • SBrownJC
  • · Replies 5 ·
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5

Undergrad Why is current defined as the rate of change of charge?

  • CoolDude420
  • · Replies 6 ·
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6

Undergrad If we take two charges and hold one still, what are the forces?

  • annamal
  • · Replies 9 ·
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9

Undergrad What is wrong with crossing electric fields? Why can't you sum them?

  • annamal
  • · Replies 19 ·
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19

Undergrad How to determine the sign of an angle in Bio Savar's law?

  • safetnezic
  • · Replies 1 ·
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1

Graduate A question about charged particle in a magnetic field

  • T C
  • · Replies 26 ·
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26

Undergrad Electric field vector takes into account the field's radial direction?

  • annamal
  • · Replies 3 ·
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3

Undergrad Will this dipole rotate or change position?

  • annamal
  • · Replies 8 ·
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8

Undergrad Calculating distance (from magnet) to an arbitrary point in 3D space

  • egoodchild
  • · Replies 6 ·
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6

Graduate Unifying Lagrangians in Electrodynamics: Fμν, Aμ Jμ, & Lorentz Force

  • DuckAmuck
  • · Replies 4 ·
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4

Graduate Jackson Sec 2.6 on "general solution" of charge near sphere

  • ForgetfulPhysicist
  • · Replies 5 ·
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5

Undergrad Why is there no negative sign in the Faraday's Law stated here

  • eognvoi
  • · Replies 4 ·
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4

Undergrad Power equation in railgun operation

  • avicenna
  • · Replies 7 ·
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7

High School How is capacitor energy the same as electrostatic potential energy?

  • versine
  • · Replies 21 ·
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21

Undergrad B-Fields: Deriving Faraday's Law & Why No Work?

  • ChanceLiterature
  • · Replies 6 ·
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6

Undergrad Incident electric field attenuation near a metallic plate

  • Bobymayor
  • · Replies 2 ·
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2

High School Generator stator: Copper wire or copper sheets?

  • Vandan
  • · Replies 5 ·
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5

High School Magnetic generator multiple poles. Cancel out or short circuit?

  • Vandan
  • · Replies 8 ·
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8

Undergrad Sum of the dot product of complex vectors

  • happyparticle
  • · Replies 2 ·
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2

Undergrad Where to find this uniqueness theorem of electrostatics?

  • coquelicot
  • · Replies 27 ·
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27

Undergrad EM equations - am I missing something?

  • Maxicl14
  • · Replies 4 ·
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4

Undergrad Magnet through Pipe Experiment, continued

  • Samson4
  • · Replies 5 ·
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5

Undergrad Question regarding the use of Electric flux and Field Lines

  • Harikesh_33
  • · Replies 25 ·
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25

Undergrad Energy emitted by EM sources under constructive interference

  • IcedCoffee
  • · Replies 7 ·
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7

Undergrad Group velocity for an electromagnetic wave inside glass

  • happyparticle
  • · Replies 1 ·
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1

Undergrad EM waves have no mass but they do have momentum?

  • BranRubaba
  • · Replies 21 ·
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21

Undergrad Understanding the Expression for a Linear EM Wave Transmission?

  • happyparticle
  • · Replies 2 ·
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2

Undergrad Why is my magnetic levitation experiment not working?

  • Woomir
  • · Replies 22 ·
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22

Graduate Propagation modes and linear systems

  • Lodeg
  • · Replies 1 ·
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1

Undergrad Derivative of the retarded vector potential

  • Salmone
  • · Replies 1 ·
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1

Undergrad Did Ohm, Ampere, and Volta Collaborate on Ohm's Law?

  • akerkarprashant
  • · Replies 20 ·
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20

Undergrad Something about retarded potentials for oscillating electric dipole

  • Salmone
  • · Replies 1 ·
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1

High School Questions regarding Magnetorheological fluids

  • dliu1004
  • · Replies 1 ·
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1

High School A moving magnet in a linear electric field

  • GregM
  • · Replies 8 ·
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8

Undergrad Seeking the Equation of Motion for a charged mass attached to a spring

  • snoopies622
  • · Replies 22 ·
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22

High School Question about electromagnetic waves -- Penetration vs. Frequency

  • samy4408
  • · Replies 4 ·
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4

Undergrad How to obtain Hamiltonian in a magnetic field from EM field?

  • Salmone
  • · Replies 6 ·
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6

Undergrad Quantifying the magnetic force on a magnet moving through a coil?

  • rayjbryant
  • · Replies 5 ·
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5

High School Ion Trap and Time-Varying Potentials

  • Anmoldeep
  • · Replies 1 ·
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1

Undergrad Permittivity/Permeability, the speed of light, and the meter

  • TRB8985
  • · Replies 12 ·
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12

Undergrad Electrostatic Influence and Series-Connected Capacitors

  • reterty
  • · Replies 5 ·
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5

High School Real world problem - Child's toy engine

  • thomas-anderson
  • · Replies 6 ·
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6

Undergrad Is the scalar magnetic Potential the sum of #V_{in}# and ##V_{out}##

  • happyparticle
  • · Replies 1 ·
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1

High School 4 Questions About Lenz's Law Experiment

  • Dustin
  • · Replies 20 ·
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20

High School What Happens When You Connect Different Voltage Batteries in Parallel?

  • Amaterasu21
  • · Replies 5 ·
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5