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Undergrad Why does vacuum have resistance?

  • iampaul
  • · Replies 14 ·
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14

Undergrad Maximizing Repulsive Force: Formulas for Designing Electromagnets?

  • amdam
  • · Replies 1 ·
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1

Undergrad Equation of electric field line

  • gracy
  • · Replies 35 ·
2
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35

Graduate Insulated metal, immersed in an ionic fluid

  • Samson4
  • · Replies 1 ·
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1

Undergrad [Magnetic Flux and Lenz's Law] Is this picture correct?

  • MienTommy
  • · Replies 2 ·
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2

High School What is Lenz's Law and how can I demonstrate it?

  • angipetrini5B
  • · Replies 1 ·
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1

High School How is a Push Solenoid Constructed Differently from a Pull Solenoid?

  • Munnu
  • · Replies 2 ·
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2

High School Can skin be positively or negatively charged?

  • Dani12345
  • · Replies 1 ·
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1

Undergrad Why is induced electric field circular?

  • turaturer
  • · Replies 4 ·
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4

Undergrad Vector field:one aspect that everyone knows but nobody shown

  • Chhhiral
  • · Replies 11 ·
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11

Graduate What holds the electron intact?

  • Amio C
  • · Replies 7 ·
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7

Graduate Understanding Dielectric Polarisation: Transformation of Dipoles and Charges

  • gracy
  • · Replies 46 ·
2
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46

High School Why do we need to square the separation in Coulomb's experiment?

  • shio
  • · Replies 2 ·
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2

Undergrad Electrons and energy expended in a circuit

  • Cluemore
  • · Replies 5 ·
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5

High School What does "stationary charges" mean in Coulomb's law?

  • Amio C
  • · Replies 5 ·
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5

Undergrad Field inside a charged sphere

  • Titan97
  • · Replies 1 ·
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1

Undergrad Units of P1 and P2 in Coulomb's Law

  • Seismic101
  • · Replies 1 ·
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1

Graduate Destructive electromagnetic waves

  • Taqa
  • · Replies 2 ·
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2

High School Direction of current in a "middle" branch?

  • DoobleD
  • · Replies 8 ·
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8

Graduate How would you Calculate the Energy in an EM field?

  • Ryan Reed
  • · Replies 9 ·
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9

Undergrad Are frequency and energy related?

  • **Mariam**
  • · Replies 4 ·
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4

Graduate E field inside wires during transient state

  • DoobleD
  • · Replies 23 ·
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23

Undergrad Why does Back EMF produce so much voltage?

  • electric jake
  • · Replies 6 ·
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6

Undergrad Would the induced EMF & current change?

  • PhiowPhi
  • · Replies 7 ·
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7

High School Electrical Resistance or Conductance of Carbon Dioxide

  • electric jake
  • · Replies 6 ·
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6

Graduate Maximum Built-In Voltage of a PN junction

  • Corwin_S
  • · Replies 4 ·
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4

Graduate Independent fields' components in Maxwell's equations

  • EmilyRuck
  • · Replies 2 ·
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2

Graduate "Intensity flicker" of Extremely low frequency (ELF) waves?

  • greswd
  • · Replies 7 ·
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7

Graduate Why is the resonance condition satisfied in a transverse resonance method?

  • EmilyRuck
  • · Replies 5 ·
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5

Undergrad Magnetic Susceptibility Tabulated Values

  • elevenb
  • · Replies 1 ·
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1

Graduate Mosfet gate charge with no voltage across D-S

  • Salvador
  • · Replies 1 ·
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1

Graduate EM wave reflection: phase shift off of conductor

  • Vannay
  • · Replies 1 ·
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1

High School Is there a unit for measuring electromagnetic force and what symbol denotes it?

  • Einstein's Cat
  • · Replies 2 ·
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2

Undergrad Why LC tank only oscillates at resonant frequency?

  • anhnha
  • · Replies 18 ·
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18

Graduate [Electromagnetics] Divergence of Current density

  • kidsasd987
  • · Replies 1 ·
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1

Graduate Can a rotating dielectric disc be polarized?

  • sergiokapone
  • · Replies 12 ·
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12

Graduate Method of images: electric dipole and infinite plane

  • RaamGeneral
  • · Replies 1 ·
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1

Graduate Current limit through solar cell (forward bias)

  • Sho
  • · Replies 4 ·
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4

Undergrad Charging of Capacitor: Why Electrons Stop?

  • gracy
  • · Replies 6 ·
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6

Graduate Propagation of EM-Waves, Independence of B and E, and Grav...

  • Anton Alice
  • · Replies 23 ·
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23

Undergrad Calculus & magnetic force on charged particle

  • marciokoko
  • · Replies 16 ·
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16

Undergrad Understanding Induced Current in a Changing Magnetic Field

  • strawman
  • · Replies 3 ·
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3

Undergrad Relationship between rolling resistance and velocity?

  • electrodruid
  • · Replies 13 ·
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13

Graduate Is the Curl of Induced E Field Always Zero?

  • Sturk200
  • · Replies 4 ·
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4

Graduate Self-Capacitance of an Insulating vs. Conductive Sphere

  • Apogee
  • · Replies 8 ·
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8

Graduate Dual Lorentz force for classical spin-orbit interaction?

  • jarekduda
  • · Replies 1 ·
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1

Graduate Optimum Length & Turns for a Search Coil of a Fluxmeter

  • Syed Khairi
  • · Replies 3 ·
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3

Graduate Misleading on Griffith electrodynamix(electric dipole)

  • galoisjung
  • · Replies 2 ·
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2

Undergrad Calculate length of wire needed for solenoid

  • Pepelepoe
  • · Replies 6 ·
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6

Undergrad Understanding the Resonance of Dipol Antennas

  • Anton Alice
  • · Replies 12 ·
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12

High School Understanding the Amplitude of Current in Halliday's Book

  • kent davidge
  • · Replies 3 ·
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3

Graduate Electric field due to point charge on an infinite metal plat

  • Titan97
  • · Replies 12 ·
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12

Graduate Evolution of magnetic field in a Z-pinch?

  • Sven Andersson
  • · Replies 2 ·
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2

Undergrad Electrostatic discharge without dielectric breakdown?

  • JenniferN
  • · Replies 2 ·
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2

Undergrad Possible to make your own magnetic gears?

  • Seanshine
  • · Replies 2 ·
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2

Undergrad E=0 inside the conducting sphere Always?

  • gracy
  • · Replies 2 ·
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2

Graduate Amount of charge stored by thin conductive plate

  • AlexVI
  • · Replies 2 ·
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2

High School Why Does a Compass Needle Align Perpendicular to a Current-Carrying Wire?

  • Pulzz
  • · Replies 20 ·
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20

Undergrad Layman explanation of some simple EM equations

  • tim9000
  • · Replies 5 ·
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5

Undergrad Transformers: high voltage, low current AND low resistance?

  • Laura555
  • · Replies 12 ·
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12

Undergrad Magnet moving over surface creating levitation

  • vidur27
  • · Replies 3 ·
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3

Undergrad Magnetic Flux Linkage: Rate of Change & Cutting

  • Ivore
  • · Replies 1 ·
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1

Undergrad Equation for the energy of an electron

  • compuser123
  • · Replies 2 ·
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2

Undergrad Energy Gained by Charge in an Electrostatic Field - Comments

  • ZapperZ
  • · Replies 2 ·
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2

Graduate Grad(div(V)) = 0: Why is this Vector Identity Dropped?

  • DoobleD
  • · Replies 3 ·
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3

Undergrad Problem in understanding self-inductance

  • anachin6000
  • · Replies 1 ·
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1

High School Most powerful electromagnet/magnet for hobbyist?

  • Sven Andersson
  • · Replies 3 ·
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3

Wanted: Looking for a helmholtz coil in Brisbane, QLD AUS

  • WannabeSmart
  • · Replies 1 ·
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1

Graduate Curl of the curl of E or B field

  • DoobleD
  • · Replies 6 ·
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6

Graduate Charges on inner and outer shell

  • gracy
  • · Replies 12 ·
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12

High School Strength of magnetic field on "eBay electromagnets"?

  • Sven Andersson
  • · Replies 2 ·
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2

See an Electron Lately? - Comments

  • ZapperZ
  • · Replies 16 ·
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16

Undergrad Electromagnetic elevation expectations

  • Drnwooten
  • · Replies 7 ·
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7

Graduate Gauss' Differential law intuition

  • THE HARLEQUIN
  • · Replies 5 ·
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5

Undergrad Is Gravity Just Electromagnetism?

  • Gazpar
  • · Replies 1 ·
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1

Graduate Describing Electromagnetic Induction of a Guitar Pickup

  • sandman18and5
  • · Replies 8 ·
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8

Undergrad Some questions regarding capacitors

  • gracy
  • · Replies 2 ·
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2

Graduate Maxwells equation in cgs system

  • wasi-uz-zaman
  • · Replies 3 ·
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3

High School Is dielectric necessary in capacitors?

  • gracy
  • · Replies 18 ·
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18

Undergrad Conductive ring levitated by electromagnet

  • RubinLicht
  • · Replies 6 ·
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6

Graduate EM: When can you replace del, d/dt with ik, -iω?

  • Cadaei
  • · Replies 2 ·
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2

Undergrad Are there any planetary systems that are influenced by EM waves?

  • Ronie Bayron
  • · Replies 4 ·
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4

Graduate EM determined by gauge freedom?

  • maline
  • · Replies 9 ·
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9

High School Does current flow in both wires or in one in our homes?

  • 123kid
  • · Replies 49 ·
2
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49

High School Question about north and south poles of a magnet.

  • Pulzz
  • · Replies 5 ·
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5

Undergrad Leakage Current Explained: What V, R, A, ρ, and d Stand For

  • gracy
  • · Replies 10 ·
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10

Undergrad Why is Plasma a good conductor of electricity?

  • motleycat
  • · Replies 3 ·
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3

Graduate Wrongly applying Faraday's Law to time changing loops

  • MisterX
  • · Replies 2 ·
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2

High School Current Flow Basics: Bulb, Wire, Insulators

  • sgstudent
  • · Replies 40 ·
2
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40

Undergrad Diode Resistance: Electric Field & P/N Junctions

  • tonyjk
  • · Replies 10 ·
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10

Undergrad Is net charge the same as excess charge in the interior of a conductor?

  • gracy
  • · Replies 1 ·
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1

Graduate Accelerating a charged particle generating an "electric field wave"

  • JaredMTg
  • · Replies 6 ·
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6

Undergrad Amp vs. USB: Understanding the Truth About Voltage and Resistance

  • ben6
  • · Replies 16 ·
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16

Graduate Electromagnetic Unification Energy?

  • tomdodd4598
  • · Replies 3 ·
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3

High School Circuit analysis -- Voltage question

  • Jamessamuel
  • · Replies 3 ·
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3

Graduate Gravity and electromagnetism equation

  • Einstein's Cat
  • · Replies 1 ·
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1

Graduate Derivation of Electric Field with Gauss's Law

  • k_squared
  • · Replies 3 ·
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3

Graduate Questions based on derivation of electrical potential energy

  • gracy
  • · Replies 10 ·
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10

Undergrad Velocity of Electrons: Orbital Motion & Velocity Explained

  • Alina Shafqat
  • · Replies 1 ·
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1

Undergrad Polarisation of magnetic field

  • gokhul
  • · Replies 1 ·
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1