Electromagnetism Forum

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Undergrad Attraction between a charge and a magnet

  • DRC12
  • · Replies 10 ·
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10

Undergrad How exactly do generators work (Please explain the Faraday's law)

  • UsualMan
  • · Replies 2 ·
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2

High School What material is a poor conductor of electricity?

  • pablito
  • · Replies 13 ·
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13

Undergrad Frequency does not matter for the "lag" ?

  • Yuri B.
  • · Replies 6 ·
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6

Graduate Self consistent maxwells equations

  • HomogenousCow
  • · Replies 1 ·
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1

Undergrad What happens to power when voltage is negative

  • anj16
  • · Replies 10 ·
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10

High School Need help with making sphere electromagnet

  • vinknee
  • · Replies 22 ·
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22

Graduate Help with physics of my Magnet Motor

  • JoeOfTex
  • · Replies 3 ·
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3

Undergrad Electrical resistivity tomography

  • Johntoby
  • · Replies 1 ·
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1

Undergrad Calculating electrical energy over time

  • anj16
  • · Replies 7 ·
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7

High School Measuring RF Frequency in Hertz for Science Projects

  • fsx
  • · Replies 8 ·
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8

Graduate Calculation of the magnetic field ring current and the magnetic flux t

  • geca2000
  • · Replies 2 ·
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2

High School Refuting Perpetual Motion with Magnets

  • acesuv
  • · Replies 1 ·
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1

Undergrad Why is the magnetic field perpendicular to the force?

  • member 392791
  • · Replies 4 ·
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4

Undergrad The units for current density don't check out

  • CraigH
  • · Replies 3 ·
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3

Graduate L Science - Understanding Electron Orbitals and Their Role in Atomic Structure

  • IxRxPhysicist
  • · Replies 6 ·
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6

Graduate What is the nature of electric charge and how does it relate to string theory?

  • x8xPTx8x
  • · Replies 12 ·
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12

Undergrad Do External Electric Fields Penetrate Conductors with Cavities?

  • jcortez91
  • · Replies 8 ·
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8

Undergrad Magnetic Susceptibility VS. Relative Permeability

  • Thesnake22
  • · Replies 3 ·
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3

Undergrad E field outside a conducting body

  • CAF123
  • · Replies 28 ·
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28

High School Copper wire and shove it into the positive terminal

  • MotoPayton
  • · Replies 3 ·
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3

Graduate Classical Electrodynamics: Explaining the Lorentz Gauge Condition

  • nrjsingh413
  • · Replies 3 ·
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3

High School Counting Electrons & Protons in an Atom

  • magmash
  • · Replies 11 ·
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11

Graduate Does the concept of dipole moment of charged molecule exist or not?

  • linwenzi
  • · Replies 6 ·
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6

High School Webpage title: Understanding Series and Parallel Circuits in Circuit Analysis

  • member 392791
  • · Replies 5 ·
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5

Undergrad High voltage, where is the power?

  • ealbers
  • · Replies 16 ·
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16

High School Capacitors in series and parallel

  • ehabmozart
  • · Replies 5 ·
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5

Undergrad Surface Charge Density - notation used

  • ZedCar
  • · Replies 1 ·
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1

Undergrad Alternating current and magnetic fields

  • SweatingBear
  • · Replies 24 ·
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24

Undergrad Why do we need to integrate to find electric field?

  • Typhon4ever
  • · Replies 6 ·
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6

Undergrad Energy of an electromagnetic wave

  • anorred
  • · Replies 5 ·
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5

Undergrad Will Magnetic Putty Form a Cube or Sphere When Swallowing a Rare Earth Magnet?

  • KenCurious
  • · Replies 1 ·
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1

Undergrad Force need to break a magnetic lock

  • AAnephite
  • · Replies 2 ·
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2

Graduate Looking for equation/proof of b field in a solenoid

  • LiftHeavy13
  • · Replies 1 ·
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1

High School How do electrons move in a circuit

  • ehabmozart
  • · Replies 1 ·
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1

Graduate Griffiths Electrodynamics gradient of charge distribution

  • Sparky_
  • · Replies 6 ·
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6

Undergrad Understanding Induced Current in Conducting Wires from Changing Magnetic Fields

  • rajeshmarndi
  • · Replies 12 ·
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12

Graduate Resonant Frequency of Open Ended Pipes with a Barrier Imposed

  • Twenty_Three
  • · Replies 2 ·
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2

Undergrad Voltage Difference Equation Terminology

  • Typhon4ever
  • · Replies 4 ·
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4

Undergrad A question in the energy of a capacitor

  • ehabmozart
  • · Replies 5 ·
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5

Undergrad Why is the flux through a closed surface zero with no charge inside?

  • guitarphysics
  • · Replies 8 ·
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8

High School Why is voltage the same in a parallel circuit

  • ehabmozart
  • · Replies 2 ·
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2

Undergrad Electric field on the surface of uniformly charged spherical shell

  • projjal
  • · Replies 6 ·
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6

Undergrad Electric Flux: What it is & Why it's Zero on a Cylinder

  • SAUMYA B
  • · Replies 1 ·
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1

Graduate What does curl E = const. on Ω say about E on ∂Ω?

  • ManDay
  • · Replies 1 ·
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1

Graduate Understanding the Relationship Between r & $\hat{r}$ in a Vector Equation

  • Astrum
  • · Replies 4 ·
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4

Undergrad Energy conversion difference in permanent magnet vs. field coil motor

  • BruceRH80
  • · Replies 1 ·
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1

Graduate Why Is a Negative Sign Used in the Electric Potential of a Charged Sphere?

  • Shinobii
  • · Replies 4 ·
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4

High School Getting high current from AA batteries

  • Pharrahnox
  • · Replies 9 ·
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9

Undergrad What Magnetic Field Would be Generated from this Coil Layout (Picture)

  • tachyon_man
  • · Replies 3 ·
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3

High School Difference between W/Q and E/Q in Electricity

  • CraigH
  • · Replies 23 ·
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23

Undergrad Question on sampling frequency/low pass filter

  • hob
  • · Replies 1 ·
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1

High School Net torque, electric dipole confusion

  • Bengo
  • · Replies 1 ·
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1

Graduate When can Gauss' theorem be applied?

  • CraigH
  • · Replies 3 ·
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3

Undergrad How to find the strength of an electromagnet

  • Pharrahnox
  • · Replies 2 ·
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2

Undergrad Why is the EMF Zero in a Uniformly Moving Coil Through a Magnetic Field?

  • ltkach
  • · Replies 7 ·
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7

Undergrad Lenz's law and elctromagnetic waves

  • pppp
  • · Replies 2 ·
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2

Graduate Analytical equation for Magnetic Levitation

  • Davidk92
  • · Replies 3 ·
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3

Undergrad Name of representation of vectors perpendicular to the plane

  • duddo
  • · Replies 2 ·
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2

Graduate Scattering of an unpolarized photon off an electron

  • fairy._.queen
  • · Replies 8 ·
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8

Graduate Would a magnetic charge have the same strength as a electric charge?

  • Thesnake22
  • · Replies 3 ·
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3

Undergrad Understanding Voltage in Parallel RC Circuits

  • member 392791
  • · Replies 4 ·
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4

Undergrad What Happens When an Uninsulated Wire Coils Around a Metal Object?

  • Dorsk81
  • · Replies 18 ·
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18

Graduate Do I have to re-define electric field strength in Centre of Mass frame

  • elemis
  • · Replies 5 ·
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5

Undergrad Duration of Charging a capacitor

  • moatasim23
  • · Replies 2 ·
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2

High School Does the electric field make electrons?

  • silvercats
  • · Replies 3 ·
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3

Undergrad Surface field vs pull force(attraction force) of multiple magnets?

  • Phztastic
  • · Replies 2 ·
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2

Undergrad Electric Flux of Concentric Spheres

  • moatasim23
  • · Replies 1 ·
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1

Undergrad Potential energy and magnetic torque

  • Jaymo3141
  • · Replies 1 ·
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1

High School ADR for Middle School Science fair project (Magnetic Refrigeration)

  • fellersmtc
  • · Replies 1 ·
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1

Undergrad How to calculate electric charge with a given electric potential?

  • Bobcent
  • · Replies 6 ·
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6

Graduate Solving 2nd ODE for RLC circuit

  • serverxeon
  • · Replies 1 ·
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1

Undergrad Is angular frequency absolute?

  • tade
  • · Replies 3 ·
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3

Graduate Object detection through magnetic signature [field]?

  • pettt
  • · Replies 4 ·
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4

Undergrad How Can I Improve My Spark Gap Switch for High-Speed Photography?

  • DesmondD
  • · Replies 4 ·
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4

Undergrad Can Different Same-Voltage Batteries Be Used in Parallel for Discharge Only?

  • diy50per
  • · Replies 5 ·
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5

High School How To Determine Series & Parallel Connections With Multiple Batteries

  • Aditi agarwal
  • · Replies 2 ·
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2

Graduate How do you apply Gauss's Law at an interface with different permittivities?

  • pop_ianosd
  • · Replies 3 ·
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3

High School Can a high voltage across a chamber ionize a gas?

  • asaayush
  • · Replies 15 ·
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15

Undergrad How are Electromagnetic signals specified?

  • jaydnul
  • · Replies 2 ·
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2

Undergrad Net charge of a spherical capacitor

  • ksoileau
  • · Replies 1 ·
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1

Graduate Suppose an electron was kept with an alpha particle at a finite

  • ehabmozart
  • · Replies 18 ·
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18

Undergrad Qualitative meaning of electric potential

  • ehabmozart
  • · Replies 6 ·
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6

Undergrad Verification of electric potential

  • ehabmozart
  • · Replies 2 ·
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2

Undergrad Questions on Capacitors Concepts: Battery Charging, Electric Fields, Work Done

  • easwar2641993
  • · Replies 2 ·
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2

High School Boit's experiment on electrostatics

  • Carcul
  • · Replies 1 ·
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1

Undergrad Confusion in electric potential energy

  • ehabmozart
  • · Replies 8 ·
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8

Graduate Levitation using directed electric fields

  • taylaron
  • · Replies 13 ·
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13

Graduate Charging Fluid: Questions & Answers

  • AkInfinity
  • · Replies 9 ·
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9

Undergrad Earth's Magnetic Field: Does it Rotate?

  • Buckethead
  • · Replies 3 ·
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3

Undergrad Maximum possible force between two electrically charged plates?

  • Bobcent
  • · Replies 2 ·
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2

Undergrad Properties of an electromagnet

  • Jaymo3141
  • · Replies 1 ·
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1

Undergrad Understanding Kirchhoff's Rules for Solving Electrical Circuits

  • member 392791
  • · Replies 3 ·
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3

Undergrad Electric Potential of a Uniformly Charged Sphere

  • Typhon4ever
  • · Replies 2 ·
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2

Graduate Energy flow in presence of electric and magnetic field

  • nitin_zilch
  • · Replies 12 ·
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12

Graduate Charge Transfer and Force Dynamics in an Electromagnetic System

  • Berzurker
  • · Replies 1 ·
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1

High School How Does Voltage Drop Across a Resistor?

  • member 392791
  • · Replies 3 ·
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3

Undergrad Does temperature effect how easily something is magnetized?

  • Nathew
  • · Replies 4 ·
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4

Undergrad Work to Move parallel capacitor Plates

  • Typhon4ever
  • · Replies 10 ·
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10

Undergrad I am very confused about the physical meaning of the concept flux

  • la6ki
  • · Replies 9 ·
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9