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Undergrad Number of free conduction electrons in a segment of wire

  • nDever
  • · Replies 2 ·
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Graduate Electromagnetic Wave in the Y-Direction

  • Fascheue
  • · Replies 1 ·
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1

Graduate Maxwell's equation in microscopic formulation and speed of EM-waves

  • Delta2
  • · Replies 3 ·
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3

Undergrad Surprising sound frequency from a bottle

  • Pereskia
  • · Replies 10 ·
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10

Undergrad How Fast Does an Electrical Impulse Travel in a Copper Wire?

  • Byron Forbes
  • · Replies 100 ·
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100

Undergrad How to insulate an object with electromagnetism?

  • Atran
  • · Replies 6 ·
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6

Graduate The forgotten magnetic scalar potential

  • Delta2
  • · Replies 1 ·
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1

Undergrad Response of a motor rotor to just 1/60th of a second of current

  • jake jot
  • · Replies 53 ·
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Undergrad What is an electron lens diameter?

  • accountkiller
  • · Replies 1 ·
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1

Graduate What is a coefficient of resistance?

  • diagopod
  • · Replies 1 ·
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1

Graduate How Does Equatorial Magnetism Vary Among Solar Bodies?

  • 3demon
  • · Replies 1 ·
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1

Undergrad Issues concerning the 2.4 GHz band

  • neenerx2
  • · Replies 1 ·
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1

Graduate Location of electrons (not excess charge) in a conductor [static case]

  • Kostik
  • · Replies 2 ·
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2

Graduate Magnetic Flux through a Closed Surface and Maxwell's laws

  • leo9999
  • · Replies 14 ·
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14

Undergrad How are holes charge carriers?

  • CoolDude420
  • · Replies 1 ·
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1

Undergrad Using Ampere's Law for these two different integration paths

  • WannaLearnPhysics
  • · Replies 1 ·
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1

Graduate Behavior of charged particles in a speed selector

  • greg_rack
  • · Replies 3 ·
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3

Undergrad What is the physical significance of torque being a vector in an electric motor?

  • greg_rack
  • · Replies 4 ·
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4

Graduate EM Penetration Depth Into the Ground

  • david_nelson
  • · Replies 11 ·
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11

Undergrad Problem about the usage of Gauss' law involving the curl of a B field

  • georg gill
  • · Replies 6 ·
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6

High School Magnetic Attraction: Watching Magnets Move in Unison

  • danielhaish
  • · Replies 24 ·
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24

Undergrad Can infrared photons also eject electrons in 'photoelectric effect'?

  • royp
  • · Replies 5 ·
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5

Graduate Electric Fields with Motional EMF

  • Rolls With Slipping
  • · Replies 20 ·
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20

Graduate Gauss' divergence theorem and thermoelectricity contradiction

  • fluidistic
  • · Replies 1 ·
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1

Graduate Fresh air (vacuum) as media for electromagnetics, can it have losses?

  • Fernandopozasaura
  • · Replies 6 ·
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6

Graduate Questions About Highly Coupled Magnetic Resonance

  • G Cooke
  • · Replies 8 ·
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8

Undergrad Why would an electron-emitting heated coil require AC?

  • greypilgrim
  • · Replies 5 ·
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5

Undergrad How Gauss’ Law is applied to cylinders

  • ynbo0813
  • · Replies 20 ·
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20

Graduate At least One Faraday Tube Between Every Two Unlike Charges in the Universe

  • Narayanan KR
  • · Replies 5 ·
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5

Undergrad Magnetic attraction / repulsion from the Lorentz force

  • SamRoss
  • · Replies 35 ·
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35

Graduate Imaging Emitted Covid 19 Samples with an Electron Microscope

  • Chas Tennis
  • · Replies 25 ·
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25

Undergrad LRC Series Circuit with an AC Source

  • rtareen
  • · Replies 10 ·
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10

Undergrad AC Frequency UK: Why Does Filament Lamp Flash 25Hz?

  • James2020
  • · Replies 7 ·
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7

Graduate Electrodynamics regarding volume charge density behavior

  • AHSAN MUJTABA
  • · Replies 4 ·
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4

High School Difference between RC and RRC circuits

  • greg_rack
  • · Replies 13 ·
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13

Undergrad Maximum Induced Voltage of an AC Generator

  • LePainguin
  • · Replies 2 ·
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2

Undergrad Magnetic field lines around electron and wire seem to contradict

  • SamRoss
  • · Replies 6 ·
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6

Undergrad Best straightforward method to calculate the direction of the Lorentz force

  • greg_rack
  • · Replies 5 ·
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5

Graduate Is capacitance more fundamental than resistance?

  • member 666967
  • · Replies 16 ·
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16

Undergrad Electrolysis of Water: How Does the Electric Field Affect Covalent Bonds?

  • erocored
  • · Replies 8 ·
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8

Graduate Questions about magnetic levitation of a Thompson Ring

  • jaumzaum
  • · Replies 6 ·
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6

Undergrad Can a Match be Used as a Conductor in a Triboelectricity Experiment?

  • jaumzaum
  • · Replies 6 ·
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6

High School Charges of capacitors in series and in parallel

  • greg_rack
  • · Replies 7 ·
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7

Graduate Is the Configuration of Magnetic Fields Only a Convention?

  • cg0303
  • · Replies 60 ·
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Graduate Characterizing Total Charge of Conductor A in an External Electrical Field

  • coquelicot
  • · Replies 8 ·
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8

Undergrad "Energy Type Functionals" in Jackson

  • Luke Tan
  • · Replies 2 ·
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2

Undergrad Electric potential difference at the ends of a resistor

  • greg_rack
  • · Replies 4 ·
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4

Graduate Placing an AC magnetic field inside a static DC field

  • MrNewton
  • · Replies 8 ·
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8

Undergrad Why is the Force on the Wire Directed from Stronger to Weaker Field?

  • songoku
  • · Replies 10 ·
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10

Graduate Bypass current of parallel conected inductor/diode

  • hsinhui
  • · Replies 1 ·
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1

High School What Is the Physical Significance of Logarithmic IV Graphs in Diodes?

  • OwlsInATrenchcoat
  • · Replies 3 ·
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3

Undergrad Computing F with Nabla Identity

  • rakso
  • · Replies 3 ·
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3

Undergrad Clarifications about electric potential and potential difference

  • greg_rack
  • · Replies 2 ·
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2

Graduate Introduction to Electric Vector Potential and Its Applications

  • rude man
  • · Replies 17 ·
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17

High School What is Static According to Nikola Tesla?

  • iVenky
  • · Replies 6 ·
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6

Undergrad Why is the Plate Tilted in an Electron Gun?

  • SWKatzen
  • · Replies 7 ·
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7

Undergrad Non-electrical demagnetiser (demagnetiser)

  • sophiecentaur
  • · Replies 11 ·
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11

Graduate About Maxwell's equations and the attempt to insert a magnetic monopole

  • LCSphysicist
  • · Replies 1 ·
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1

Graduate Facing issues in understanding a Purely Inductive Circuit

  • Kaushik
  • · Replies 13 ·
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13

Graduate What are the existence of solutions to Maxwell's equations?

  • timeant
  • · Replies 8 ·
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8

High School What is the voltage in a parallel circuit?

  • erocored
  • · Replies 5 ·
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5

High School How to calculate the resistance of a series circuit?

  • erocored
  • · Replies 12 ·
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12

Graduate Why does an excimer lamp produce a double filament discharge?

  • VACUUMIST
  • · Replies 17 ·
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17

Undergrad Capacitors connected in series: Why is the voltage the same?

  • Adesh
  • · Replies 101 ·
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Undergrad Dot product in spherical coordinates

  • FrankJ777
  • · Replies 2 ·
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2

High School Why is the current the same in series circuits?

  • erocored
  • · Replies 9 ·
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9

What Happens When Gold Atoms Merge in This Fascinating Video?

  • cmb
  • · Replies 2 ·
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2

Graduate Electromotive Force, Batteries, Resistors, and Potential Differences

  • rtareen
  • · Replies 17 ·
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17

Undergrad Equivalence principle and the Uniqueness theorem

  • Unconscious
  • · Replies 4 ·
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4

Graduate Electromagnetic stress tensor from pressure and tension

  • Glenn Rowe
  • · Replies 6 ·
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6

Undergrad Can light cause eddy currents?

  • iVenky
  • · Replies 10 ·
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10

Undergrad Question about Grounding in this Circuit

  • rtareen
  • · Replies 2 ·
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2

Graduate Jackson Classical Electrodynamics: page 35 expansion of charge

  • qnach
  • · Replies 5 ·
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5

Undergrad Grating element of an acoustic grating

  • Saptarshi Sarkar
  • · Replies 17 ·
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17

High School EM fields and magnetic induction from an experiment

  • Quarinteen
  • · Replies 7 ·
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7

Graduate Electric Field Divergence of Monochromatic Plane Wave: Why is it Zero?

  • zb23
  • · Replies 15 ·
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15

Graduate A Capacitor With A Dielectric But Also Free Space in Between

  • rtareen
  • · Replies 5 ·
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5

Undergrad How will electrons flow in a very long conductor?

  • erocored
  • · Replies 8 ·
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8

Undergrad Does the current speed matter when accelerating?

  • shlosmem
  • · Replies 5 ·
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5

High School Does the electrostatic force create current in the circuit?

  • erocored
  • · Replies 10 ·
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10

High School How do electrons move in a conductor?

  • erocored
  • · Replies 4 ·
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4

Undergrad AC circuit and non-conservative field

  • kidsasd987
  • · Replies 11 ·
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11

Graduate Velocity of charges or bounding curve features in motional EMF?

  • etotheipi
  • · Replies 3 ·
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3

Graduate Relaxation time and average electron velocity in Drude model

  • Sunny Singh
  • · Replies 1 ·
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1

Graduate Is Maxwell's Demon Limited by Energy Required for Door Movement?

  • Eric Bretschneider
  • · Replies 8 ·
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8

Undergrad What causes an electric force in one situation but not in another?

  • Physics0001
  • · Replies 6 ·
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6

High School How to apply Lenz' law if we don't know what to oppose?

  • Frigus
  • · Replies 9 ·
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9

Graduate Ampere's Law & Biot-Savart: Dealing with Infinity

  • zb23
  • · Replies 13 ·
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13

High School Magnetism: Properties, Effects & Uses - 65 Chars

  • dibilo
  • · Replies 5 ·
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5

High School Could electricity power a rocket? Feedback appreciated!

  • joey13
  • · Replies 9 ·
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9

Graduate Magnetic field of a point charge moving uniformly

  • Hiero
  • · Replies 3 ·
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3

Undergrad Electric Field Between two Parallel Conducting Plates of Equal Charge

  • rtareen
  • · Replies 2 ·
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2

Graduate Electromagnetic mass of an electron

  • PainterGuy
  • · Replies 3 ·
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3

Graduate Lightning rods and Corona Discharge

  • Stephen Bulking
  • · Replies 10 ·
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10

Graduate Frequency in Maxwell's equations

  • fisher garry
  • · Replies 19 ·
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19

Graduate Potential Energy of an Electric Dipole in a Uniform Field

  • rtareen
  • · Replies 11 ·
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11

Undergrad Rolling resistance when speed is zero

  • haushofer
  • · Replies 15 ·
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15

Graduate Pre 2019 definitions for an Ampere, how is this useful in practice?

  • Glenn G
  • · Replies 10 ·
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10

Graduate Are there articles on Classical computation of the Photoelectric Effect?

  • thaiqi
  • · Replies 21 ·
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21

Undergrad Grounding a circuit through a capacitor/parallel RC circuit

  • jozefmak
  • · Replies 7 ·
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7