Electromagnetism Forum

Post thread

Threads

Graduate Physical degrees of freedom of an Electromagnetic field

  • Frank Castle
  • · Replies 4 ·
Replies
4

Graduate Does an electromagnetic shield reflect?

  • infi
  • · Replies 4 ·
Replies
4

Graduate Total energy of a shell charge

  • Buffu
  • · Replies 5 ·
Replies
5

Graduate Electric field by continuous charge distributions.

  • Buffu
  • · Replies 2 ·
Replies
2

Undergrad Confusion over electric field inside a charged shell

  • AdrianMachin
  • · Replies 6 ·
Replies
6

Undergrad Why Does Charge Only Distribute on the Outer Surface of a Conducting Shell?

  • pixel
  • · Replies 3 ·
Replies
3

Graduate Induced charge density -- non-zero potential case

  • mertcan
  • · Replies 2 ·
Replies
2

Undergrad Is Work Done by a Voltage Source Positive or Negative When Current Opposes EMF?

  • hackhard
  • · Replies 4 ·
Replies
4

Graduate Neodymium magnet partial shielding

  • Martin Quevedo
  • · Replies 8 ·
Replies
8

Undergrad Bull charging and you charge the bull

  • TheWonderer1
  • · Replies 40 ·
2
Replies
40

Undergrad Can one cathode transfer electrons to multiple anodes

  • ahmed11
  • · Replies 6 ·
Replies
6

High School How do changing magnetic fields affect the speed of motors?

  • Blue Scallop
  • · Replies 29 ·
Replies
29

Undergrad Electric field due to plane of charge

  • kelvin56484984
  • · Replies 5 ·
Replies
5

Undergrad Thermal resistance without area

  • whatdoido
  • · Replies 5 ·
Replies
5

Undergrad The KE of an electron accelerated by an electric field

  • claudius
  • · Replies 1 ·
Replies
1

Undergrad What is the Mistake in My Electric Potential Problem Calculation?

  • Henry Shi
  • · Replies 1 ·
Replies
1

Graduate What does Griffith mean by this hint? [Electrodynamics]

  • Mind----Blown
  • · Replies 1 ·
Replies
1

Graduate Casimir force experiments under environmental EM noises?

  • pchu
  • · Replies 1 ·
Replies
1

Undergrad Plasma arc with multiple electrodes

  • ahmed11
  • · Replies 1 ·
Replies
1

Graduate Cherenkov Radiation and Non-Dielectric Materials

  • Drakkith
  • · Replies 1 ·
Replies
1

Undergrad Understanding Lorenz Gauge Derivation

  • Silviu
  • · Replies 1 ·
Replies
1

Undergrad Can the presence of a field be detected w/o any charge?

  • sasan
  • · Replies 12 ·
Replies
12

High School Fluid that emits light when applied voltage, got tips?

  • Addez123
  • · Replies 2 ·
Replies
2

Undergrad Why Does No Current Flow Between C and D in This Circuit?

  • Kara386
  • · Replies 13 ·
Replies
13

Undergrad Looking for guidance on electrical impedance

  • Cardback
  • · Replies 2 ·
Replies
2

Graduate Estimating # of photons/electron from magnetron.

  • Spinnor
  • · Replies 2 ·
Replies
2

Undergrad Change in direction of electric field on conductor surface

  • Noaha
  • · Replies 18 ·
Replies
18

Graduate Do ferromagnetic materials do "spatial averaging"?

  • GaryLS
  • · Replies 2 ·
Replies
2

Undergrad Electrical Potential Energy and Electric Potential

  • Haynes Kwon
  • · Replies 2 ·
Replies
2

Graduate Solutions of wave equation but not Maxwell equations

  • crick
  • · Replies 1 ·
Replies
1

Undergrad Does a battery exert energy keeping a capacitor charged?

  • Piotr R
  • · Replies 44 ·
2
Replies
44

High School What is the difference btwn positive and negative electrodes

  • Kuzon
  • · Replies 1 ·
Replies
1

Undergrad Function of the Electromagnetic spectrum

  • Gjmdp
  • · Replies 7 ·
Replies
7

Graduate Maxwell eqs. - integral formulation in dynamics

  • lightarrow
  • · Replies 16 ·
Replies
16

Graduate X-ray tube flux and my experimental test setup

  • Manuel
  • · Replies 2 ·
Replies
2

Undergrad The direction of electric dipole moment of water molecule

  • AdrianMachin
  • · Replies 7 ·
Replies
7

Undergrad Inductor leading lagging voltage-current

  • superslow991
  • · Replies 2 ·
Replies
2

Graduate Thought experiment: charged particles

  • davidge
  • · Replies 19 ·
Replies
19

Undergrad Induced EMF in a half vs. whole ferrite toroid

  • GaryLS
  • · Replies 1 ·
Replies
1

Graduate Circular motion of an electron in a magnetic field

  • Cathr
  • · Replies 8 ·
Replies
8

Graduate Can Matter-Antimatter Annihilation Yield High Energy Output per Gram?

  • Dembara
  • · Replies 3 ·
Replies
3

Graduate Calculating Magnetic Field Strength from FFT

  • MxwllsPersuasns
  • · Replies 10 ·
Replies
10

Undergrad Charge accumulation for in series batteries

  • DonYuri
  • · Replies 6 ·
Replies
6

High School VIR Chart for Circuit Analysis: A Quicker & Intuitive Alternative to Loop Rule

  • stephen8686
  • · Replies 1 ·
Replies
1

Undergrad The functional form for dependence of force on Current?

  • alfab
  • · Replies 4 ·
Replies
4

Undergrad Capacitance of parallel plate capacitor separated by

  • Devarsh Patel
  • · Replies 3 ·
Replies
3

Undergrad Can prisms separate out radio and gamma rays?

  • revv
  • · Replies 3 ·
Replies
3

Undergrad Electroplating - radioactive materials in my drawer?

  • Spacey
  • · Replies 10 ·
Replies
10

Undergrad Magnetic field due to electron?

  • rahaverhma
  • · Replies 4 ·
Replies
4

Graduate How to calculate the voltage needed to create a plasma

  • ahmed11
  • · Replies 11 ·
Replies
11

Graduate Modelling eddy currents in a pendulum

  • FabusMarco
  • · Replies 2 ·
Replies
2

Undergrad Is the Energy of Gamma Rays and Radio Waves Equivalent with Equal Amplitudes?

  • physics user1
  • · Replies 19 ·
Replies
19

Graduate Why can't we define a kg as a multiple of the electron mass

  • RaamGeneral
  • · Replies 7 ·
Replies
7

Graduate Interaction between a neutral atom and an external magnetic field

  • davidt92
  • · Replies 2 ·
Replies
2

High School Can a magnet have more push force than it weighs?

  • JustSomeone
  • · Replies 9 ·
Replies
9

Undergrad Does a wire loops' magnetic field affect it's current?

  • Addez123
  • · Replies 1 ·
Replies
1

Undergrad How do you calculate the force between two magnetic dipoles?

  • adrianowatson
  • · Replies 5 ·
Replies
5

Undergrad Approximate a plane E&M wave with this large sum....

  • Spinnor
  • · Replies 2 ·
Replies
2

Undergrad Electric field of a moving charge?

  • physics user1
  • · Replies 3 ·
Replies
3

Undergrad Can't we use dq/dt in RC discharge?

  • yosimba2000
  • · Replies 3 ·
Replies
3

Undergrad RC circuits multpile R's and C's

  • Arman777
  • · Replies 6 ·
Replies
6

Undergrad Is electric field always 0 if potential at a point is 0?

  • Nabin kalauni
  • · Replies 2 ·
Replies
2

Graduate Are particles accelerated along magnetic field lines?

  • GingerCat
  • · Replies 7 ·
Replies
7

High School Questions about the Suns magnetic field

  • cbeckelhymer
  • · Replies 10 ·
Replies
10

Graduate [E&M] Sliding Conductor & Magnetic Field

  • CyberneticTitan
  • · Replies 1 ·
Replies
1

Graduate The dielectric constant of water is 80, but refractive index

  • pallab
  • · Replies 3 ·
Replies
3

High School What is the Relationship Between Solenoids and Magnetic Bars?

  • superslow991
  • · Replies 1 ·
Replies
1

High School Electricity, voltage, current, resistance relationship

  • Kajan thana
  • · Replies 23 ·
Replies
23

Undergrad Building speakers, induction and induced current

  • Porter22
  • · Replies 3 ·
Replies
3

Undergrad Electromagnetic induction in current loops

  • phys
  • · Replies 9 ·
Replies
9

Undergrad Electric field created by point charges and conducting plane

  • KV71
  • · Replies 8 ·
Replies
8

Undergrad Conceptual Understanding for Voltage in a Circuit

  • Blissed
  • · Replies 62 ·
3
Replies
62

Undergrad Difference in formulas of magnetic force and magnetic flux

  • Faiq
  • · Replies 3 ·
Replies
3

High School Is generating electricity from rain water efficient?

  • DWT
  • · Replies 7 ·
Replies
7

High School Half wave dipole antenna physics

  • midz99
  • · Replies 4 ·
Replies
4

Undergrad Can magnets on a cylindrical object be used for projectiles?

  • Alanay
  • · Replies 21 ·
Replies
21

High School Is an induction coil used in a Gaussmeter?

  • kumar
  • · Replies 1 ·
Replies
1

Undergrad Salt concentration and its electrical resistance

  • Jane Bondarenko
  • · Replies 3 ·
Replies
3

Undergrad Electric field strength inside a conductor

  • Faiq
  • · Replies 21 ·
Replies
21

High School Can magnets be used to send a metal ball through a pipe?

  • Alanay
  • · Replies 17 ·
Replies
17

Undergrad Electromagnetic Coil 2 SS Rods Converging

  • cluelessGUY
  • · Replies 1 ·
Replies
1

Undergrad Hall Effect & Magnetic Induction Explained

  • superslow991
  • · Replies 2 ·
Replies
2

Undergrad Weber & Flux Density: Learn How 1 Wb = 10^8 Lines of Magnetic Flux

  • Glenn G
  • · Replies 5 ·
Replies
5

Undergrad Why does the speed of the magnet matter in a coil?

  • alfab
  • · Replies 6 ·
Replies
6

Undergrad Capacitor-Energy-Dielectric question

  • Arman777
  • · Replies 7 ·
Replies
7

High School Would current flow in a vacuum like space

  • Shark1j
  • · Replies 15 ·
Replies
15

Undergrad Effect of frequency and intensity on PE

  • Conductivity
  • · Replies 6 ·
Replies
6

Undergrad Orthogonal Polarisation in EM waves and Interference

  • ThunderLight
  • · Replies 7 ·
Replies
7

Graduate Thermal motion of an ionised gas molecule in an electric field

  • pranj5
  • · Replies 11 ·
Replies
11

Undergrad Why do EM waves of longer wavelengths spread out more?

  • ThunderLight
  • · Replies 8 ·
Replies
8

High School Can an Electrostatic Fluid Accelerator inflate a balloon?

  • smiddleton
  • · Replies 5 ·
Replies
5

Undergrad Calculate the temperature of a wire as an electrical current flows through it

  • Mr.somebody
  • · Replies 1 ·
Replies
1

Undergrad Data needed: Relative permittivity of air

  • WhiteHaired
  • · Replies 2 ·
Replies
2

Graduate Surface current density-logic and definition contradict

  • Mind----Blown
  • · Replies 8 ·
Replies
8

Graduate Necessary and sufficient condition for an electron to radiat

  • qnach
  • · Replies 3 ·
Replies
3

Undergrad Gauss' gun/magnetic linear accelerator

  • daisy3110
  • · Replies 1 ·
Replies
1

Undergrad Electromagnetism from solonid within magnetic field -- reasoning....

  • Evenus1
  • · Replies 1 ·
Replies
1

Undergrad Can a Half Dipole Antenna Function Inside a Resonant Cavity?

  • Massi
  • · Replies 13 ·
Replies
13

Undergrad What is Electricity? Insights please....

  • Arceus74
  • · Replies 11 ·
Replies
11

Graduate How Do Electrolytes Conduct Charge Without Redox Reactions?

  • mic*
  • · Replies 23 ·
Replies
23