Electromagnetism Forum

Post thread

Threads

Undergrad Question about Field Strength of Solenoid Positioned Near a Magnet

  • JayAshby
  • · Replies 9 ·
Replies
9

High School Understanding the Relationship Between Coulomb and Ampere in Physics

  • Elementi
  • · Replies 8 ·
Replies
8

Undergrad Resistance and specific resistance relationships

  • Dario56
  • · Replies 16 ·
Replies
16

High School What's the difference between these two curves for AC Generator?

  • Physical_Fire
  • · Replies 11 ·
Replies
11

Graduate Ponderomotive force and conservation of momentum

  • Philip Koeck
  • · Replies 1 ·
Replies
1

Undergrad Capacitor connected to voltage source, vary plate separation

  • greypilgrim
  • · Replies 9 ·
Replies
9

Undergrad Structural difference between soft and hard ferromagnets

  • hokhani
  • · Replies 4 ·
Replies
4

Undergrad In ##\nabla\cdot\vec{E}## why can ##\nabla## pass through the integral?

  • zenterix
  • · Replies 8 ·
Replies
8

High School How Much Energy is Stored in Earth's Magnetic Field?

  • Mikael17
  • · Replies 2 ·
Replies
2

Undergrad Do electric currents depend on the frame of reference?

  • Meow12
  • · Replies 5 ·
Replies
5

Undergrad Simple electromagnetic wave including delay

  • a1titude
  • · Replies 2 ·
Replies
2

High School Current-carrying coil and solenoid

  • Meow12
  • · Replies 3 ·
Replies
3

Undergrad Generating Divergence Equation In Cylindrical Coordinates

  • Hardy
  • · Replies 3 ·
Replies
3

Undergrad Is this solenoid / permanent magnet configuration possible?

  • JayAshby
  • · Replies 5 ·
Replies
5

Undergrad Why don't we talk about the E & H fields instead of E & B fields?

  • deuteron
  • · Replies 7 ·
Replies
7

Undergrad Contradiction in formula for motional EMF

  • masteralien
  • · Replies 2 ·
Replies
2

Undergrad Question about magnetohydrodynamics (MHD) for electricity production

  • DavAeroEng
  • · Replies 4 ·
Replies
4

High School Can I use this method to charge a metal sphere?

  • abdossamad2003
  • · Replies 9 ·
Replies
9

Undergrad Alternating current in a perfect conductor

  • Txema
  • · Replies 11 ·
Replies
11

Undergrad What causes the unexpected annihilation point in the Magic-Tee configuration?

  • Leopold89
  • · Replies 15 ·
Replies
15

Undergrad Problems in classical electrodynamics: Only for point-like particles?

  • greypilgrim
  • · Replies 1 ·
Replies
1

Undergrad Where did I make a mistake in simplifications of equations of EM field?

  • olgerm
  • · Replies 1 ·
Replies
1

Graduate Visualising visible light Fluorescence

  • aaaaautumn
  • · Replies 6 ·
Replies
6

Undergrad New frequency generation in AM signal

  • semc
  • · Replies 47 ·
2
Replies
47

Undergrad Light intensity required to shine a light through an opaque object

  • KataruZ98
  • · Replies 22 ·
Replies
22

High School Magnetic attraction force Question

  • eightplusonefingers
  • · Replies 7 ·
Replies
7

High School Consequences of a 1 Tesla magnetic field coming into the proximity of Earth?

  • happyhacker
  • · Replies 11 ·
Replies
11

High School Definition of ground potential in infinite sheet charge distributions

  • amylostorm
  • · Replies 11 ·
Replies
11

Graduate Proving an equation in a book about Periodic Structures

  • haji-tos
  • · Replies 6 ·
Replies
6

High School Symmetry regarding induced potentials?

  • haruspex
  • · Replies 4 ·
Replies
4

Undergrad What is the ideal fluid and setup for observing Magnetohydrodynamics?

  • SCHROEDERFPM
  • · Replies 1 ·
Replies
1

High School Confused about this force calulation in Resnick Halliday Krane Electrostatics

  • KnightTheConqueror
  • · Replies 5 ·
Replies
5

High School Electromagnetic radiation interacting with a magnetic field

  • Vectronix
  • · Replies 24 ·
Replies
24

Undergrad Permanent Magnetic Dipole in an electromagnetic field

  • Aviax98
  • · Replies 2 ·
Replies
2

High School Is the Direction of Magnetic Fields Truly Conventional?

  • pgirl1729
  • · Replies 6 ·
Replies
6

Graduate Magnetization and magnet poles

  • FEAnalyst
  • · Replies 10 ·
Replies
10

Undergrad How to Measure the Energy of an Electromagnetic Wave?

  • DavAeroEng
  • · Replies 4 ·
Replies
4

Undergrad Prevent a robotic cleaner from climbing on a block of iron with a magnet?

  • CharlesT
  • · Replies 8 ·
Replies
8

Undergrad Which law defines the AC inducing voltage in the inductor?

  • Dario56
  • · Replies 25 ·
Replies
25

Undergrad Does a Railgun's Current Violate Conservation of Momentum?

  • greypilgrim
  • · Replies 61 ·
3
Replies
61

Graduate Identifying Magnet Grade for FEMM Simulation: Neodymium Cylinder Magnets

  • Papote
  • · Replies 5 ·
Replies
5

Graduate Electric field of infinite sheet with time dependent charge

  • ramazkhomeriki
  • · Replies 22 ·
Replies
22

Undergrad Measuring change of magnetic field strengh over distance

  • april7
  • · Replies 8 ·
Replies
8

High School Can we use a permanent magnet and a copper rod to create an electret?

  • Wo Wala Moiz
  • · Replies 16 ·
Replies
16

Undergrad Can EM waves stimulate neurons?

  • Sibilo
  • · Replies 16 ·
Replies
16

High School Does the Electric Field Change When One Charge Moves Relative to Another?

  • DrBanana
  • · Replies 7 ·
Replies
7

High School Why is the test charge always positive?

  • misbah alshaybani
  • · Replies 3 ·
Replies
3

High School Extracting electrical energy from Orbital motion

  • camptent
  • · Replies 10 ·
Replies
10

Undergrad What causes skin effect in AC currents?

  • Qmavam
  • · Replies 2 ·
Replies
2

High School Measuring electric field vs magnetic field

  • aphelix
  • · Replies 8 ·
Replies
8

Undergrad The electric field due to a dipole

  • wolly
  • · Replies 2 ·
Replies
2

Undergrad Does B=0 at points out of the plane containing and normal to a point current I?

  • Trollfaz
  • · Replies 8 ·
Replies
8

Undergrad Geometry of Magnetic field lines as they approach a magnet pole?

  • doomer
  • · Replies 28 ·
Replies
28

Undergrad When to properly use "voltage"

  • greypilgrim
  • · Replies 25 ·
Replies
25

Undergrad Does the Skin Effect cause charge to accumulate on the surface of a conductor?

  • Sibilo
  • · Replies 36 ·
2
Replies
36

Undergrad Railgun: Significant magnetic field where projectile is?

  • greypilgrim
  • · Replies 8 ·
Replies
8

High School Why can only the electric field (E) be measured?

  • aphelix
  • · Replies 23 ·
Replies
23

Undergrad Circular loop in uniform magnetic field

  • Trollfaz
  • · Replies 11 ·
Replies
11

Undergrad Is the magnetic field from this current rotationally symmetric?

  • Trollfaz
  • · Replies 12 ·
Replies
12

Graduate General solution to Laplacian in cylindrical coordinates

  • Trollfaz
  • · Replies 13 ·
Replies
13

Undergrad Do you think emissivity of air makes sense?

  • Fefetltl
  • · Replies 16 ·
Replies
16

Undergrad Results of measurement using a magnetic sensor

  • ChrisCOD
  • · Replies 21 ·
Replies
21

Undergrad Question about electromagnetics (waves and particles)

  • samy4408
  • · Replies 28 ·
Replies
28

Undergrad Electricity and Magnetism: Verifying the Inverse Square Law

  • giodude
  • · Replies 3 ·
Replies
3

Undergrad Can the Last Maxwell's Equation Explain Polarization of a Wire's Insulator?

  • BlackMelon
  • · Replies 3 ·
Replies
3

High School Understanding the Relationship Between i*cos and sin in Circuit Analysis

  • jaydnul
  • · Replies 39 ·
2
Replies
39

Undergrad Inductance Measurement: Error Due To Series Resistance

  • BlackMelon
  • · Replies 6 ·
Replies
6

Undergrad Ampere's Law For Static Magnetic Field

  • BlackMelon
  • · Replies 5 ·
Replies
5

High School Can electrons pass through a positively charged disc in electrostatic induction?

  • Zahid Iftikhar
  • · Replies 10 ·
Replies
10

Graduate Voltage and current waves in a transmission line

  • Txema
  • · Replies 4 ·
Replies
4

Undergrad Guiding center motion of charged particles in EM field

  • Korybut
  • · Replies 0 ·
Replies
0

High School Designing a current sensor for 50mA up to several dozen Amps

  • arivel
  • · Replies 17 ·
Replies
17

Undergrad Power Loss Due to An Eddy Current

  • BlackMelon
  • · Replies 3 ·
Replies
3

Graduate Green's function for problems involving linear isotropic media

  • spin_100
  • · Replies 3 ·
Replies
3

Undergrad Question about Coloumb's law notation and math in two different textbooks

  • Selectron09
  • · Replies 4 ·
Replies
4

High School Why is potential difference the same across each branch in parallel?

  • aidandv
  • · Replies 11 ·
Replies
11

Undergrad Faraday cage continuity question

  • vytautas_k
  • · Replies 11 ·
Replies
11

Graduate Why is "method of image current" valid in magnetostatics?

  • euphoricrhino
  • · Replies 4 ·
Replies
4

Undergrad Why does resistance reduce current in whole circuit?

  • bmhiggs
  • · Replies 38 ·
2
Replies
38

Undergrad Does Larmor precession change the force exerted on a magnetic dipole?

  • okaythanksbud
  • · Replies 1 ·
Replies
1

Undergrad Question about Penning Trap

  • kelly0303
  • · Replies 1 ·
Replies
1

Undergrad Rate of work done by F on charge carrier with average velocity v

  • zenterix
  • · Replies 6 ·
Replies
6

Undergrad Will insulation on electric power lines affect the flow of power?

  • KurtLudwig
  • · Replies 5 ·
Replies
5

Undergrad Magnetic Flux - Misleading Definition or what?

  • ktmsud
  • · Replies 24 ·
Replies
24

High School Melting a nail with high currents

  • greypilgrim
  • · Replies 3 ·
Replies
3

High School Where Do Electrons Go When a Battery Loses Charge?

  • hippysmith
  • · Replies 22 ·
Replies
22

High School Coulumb's Law at 1 light year distance

  • Ggb
  • · Replies 8 ·
Replies
8

Undergrad Resulting magnetic field due to the passage of an AC current

  • Nils227
  • · Replies 27 ·
Replies
27

Graduate Water bending with comb: but where do the electrons go?

  • guywithdoubts
  • · Replies 35 ·
2
Replies
35

Undergrad Help working on this example exam please

  • Martyn Arthur
  • · Replies 8 ·
Replies
8

Graduate Electrostatic interaction inside and outside the source

  • kelly0303
  • · Replies 1 ·
Replies
1

Undergrad An attempt to understand the associated variable conventions in circuits

  • zenterix
  • · Replies 1 ·
Replies
1

Undergrad Is this example incorrect in Agawal's book on electric circuits?

  • zenterix
  • · Replies 3 ·
Replies
3

Undergrad Why is there a freedom to choose gauge in gauge transformation?

  • m_prakash02
  • · Replies 3 ·
Replies
3

Undergrad Magnetic Field Intensity At the Inductor's Air Gap (+Fringing Flux)

  • BlackMelon
  • · Replies 3 ·
Replies
3

Undergrad Questions about cancelation of induced EMF and minimizing eddy currents

  • artis
  • · Replies 4 ·
Replies
4

Undergrad Is the Rutherford model invalid due to a violation of Gauss's Law?

  • jmfrank63
  • · Replies 6 ·
Replies
6

High School What is the capacitance between two points on three concentric shells?

  • Kashmir
  • · Replies 3 ·
Replies
3

High School Questions about the Universe: Positive & negative fields and effects

  • Muhammed20382
  • · Replies 4 ·
Replies
4

Undergrad Best frequency of radio light to penetrate 1 meter of sea water?

  • chemisthypnos
  • · Replies 29 ·
Replies
29