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High School Electricity generation without using magnet

  • sleepsleep
  • · Replies 21 ·
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21

Graduate Proximity of permanent magnet increases toroids inductance?

  • void109
  • · Replies 6 ·
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6

Graduate Can Electromagnetic Wavelength Replace Geometrical Length as a Distance Measure?

  • TrickyDicky
  • · Replies 6 ·
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6

High School (newbie question) Useful mental models for the flow of electricity?

  • jake_pa2001
  • · Replies 5 ·
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5

Graduate Analysis of current flow and EM fields in seawater?

  • vwrobc
  • · Replies 2 ·
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2

Graduate Finding dielectric constants for TiO2 rutile and when to use them

  • excalibur313
  • · Replies 4 ·
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4

Undergrad WHY does CURRENT attain STEADY state?

  • tan99
  • · Replies 31 ·
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31

High School Calculating Voltage Change Over Time

  • kborque
  • · Replies 1 ·
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1

Graduate Magnetic field produced by a short wire element (on 360 degree basis)

  • kmarinas86
  • · Replies 20 ·
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20

Graduate Equilibrium Shape of a Charged Elastic Ring

  • xanadu77
  • · Replies 5 ·
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5

Graduate Source for relativistic electrodynamics

  • AJ Bentley
  • · Replies 2 ·
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2

Undergrad Why does AC current radiation propagate along the wire direction?

  • johng23
  • · Replies 7 ·
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7

High School Why field lines are tangent to direction of electric forces

  • phoenix0206
  • · Replies 6 ·
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6

Undergrad Calculating Electric Flux Φ w/o typical Gaussian surface

  • chawk
  • · Replies 4 ·
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4

Graduate Phase velocity electric current

  • mela1
  • · Replies 1 ·
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1

Undergrad How Does Wavelength Affect Data Transmission Capacity?

  • alvarogz
  • · Replies 4 ·
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4

Undergrad Definition of Eo (Coulomb's law)

  • maxbashi
  • · Replies 3 ·
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3

High School What Are the Key Concepts of Voltage and Charge for Students?

  • Moogie
  • · Replies 3 ·
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3

Graduate Calculating Alternating Voltage of Conductor in Magnetic Field

  • Gavroy
  • · Replies 1 ·
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1

Graduate Does Faraday's Law Hold True in All Inertial Frames?

  • FermatPell
  • · Replies 1 ·
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1

High School Graphite leads in electrolysis

  • ufarad
  • · Replies 1 ·
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1

Undergrad Force between two oppositely charged conducting spheres

  • AxiomOfChoice
  • · Replies 4 ·
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4

High School Why Does Tongue Resistance Change When Measured with a Multimeter?

  • bos1234
  • · Replies 3 ·
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3

Undergrad Capacitance, voltage, distance and charge?

  • seto6
  • · Replies 3 ·
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3

Graduate Relationship between molecular momentum and electron orbital behavior

  • brainstorm
  • · Replies 4 ·
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4

Undergrad Mutual Inductance: Coil 1 Excited, Coil 2 Open Circuited

  • ezcheez
  • · Replies 5 ·
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5

Undergrad Electromagnetic wave cancellation

  • toxonic
  • · Replies 3 ·
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3

Undergrad Calculating Ion Charge (given Electron Configuration)

  • FeDeX_LaTeX
  • · Replies 3 ·
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3

High School If you plug a cord into an outlet and sparks fly while plugging it in

  • Simfish
  • · Replies 6 ·
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6

Undergrad Questions regarding something in Feynman's lectures.

  • SrEstroncio
  • · Replies 7 ·
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7

Graduate The effect of a Nuclear Blast on Planetary Magnetism

  • Socrates271
  • · Replies 1 ·
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1

Graduate Weakly nonlinear theories in electrohydrodynamics

  • hunt_mat
  • · Replies 0 ·
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0

Undergrad What is the principle behind measuring power in 3 phase systems using coils?

  • canicon25
  • · Replies 1 ·
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1

High School Direction of Voltage and E field

  • darkspy123
  • · Replies 2 ·
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2

Graduate Is there a contradiction in Ampere's force and motion?

  • Artlav
  • · Replies 1 ·
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1

Graduate Electronic Transitions: Energy, Spin & More

  • Ravian
  • · Replies 1 ·
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1

Graduate When Will Proton and Electron Collide in Vacuum?

  • thin_ice
  • · Replies 5 ·
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5

Undergrad Determining Linear Frequency: Velocity, Stroke & More

  • cgaday
  • · Replies 3 ·
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3

Graduate What Are the Numerical Breakdowns and Variations of Earth's Magnetic Fields?

  • Randomize
  • · Replies 5 ·
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5

Graduate Can magnetic fields be focused to distant points?

  • Researcher X
  • · Replies 8 ·
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8

Graduate Capacitance of coplaner (adjacent) plates

  • tommyers
  • · Replies 7 ·
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7

Bouncing back or blocking high frequency sound outdoors?

  • twitcher
  • · Replies 14 ·
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14

High School ? (How to vibrate a metal object with certain frequency)

  • alphite
  • · Replies 1 ·
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1

Undergrad Why does step-up transformer voltage increase reduce secondary current?

  • Sferics
  • · Replies 6 ·
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6

Undergrad How Do Electron Shell Capacities Determine Chemical Formulas?

  • FeDeX_LaTeX
  • · Replies 7 ·
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7

Undergrad Ampère's circuital law not permitted?

  • nonequilibrium
  • · Replies 5 ·
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5

Undergrad Have electromagnetic waves any polarity?

  • live4physics
  • · Replies 11 ·
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11

Graduate Mutual Inductance of two current elements

  • RSW00001
  • · Replies 4 ·
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4

Undergrad Does the lightbulb burn? (Faraday)

  • nonequilibrium
  • · Replies 2 ·
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2

Undergrad Charge displacement through a conductor

  • gemma786
  • · Replies 7 ·
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7

Undergrad Scanning Electron Microscope Images

  • pandasarecute
  • · Replies 2 ·
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2

High School Is electric potential conservative? yes.?

  • seto6
  • · Replies 5 ·
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5

High School Why Is the Electric Field Inside a Conductor Zero?

  • planesinspace
  • · Replies 3 ·
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3

High School Electric vs Magnetic Field: Transferring Energy

  • adiputra
  • · Replies 2 ·
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2

Graduate Is the Electron a Wave Medium?

  • bejoynp
  • · Replies 3 ·
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3

Undergrad Do Permanent Magnets Make Motors More Efficient?

  • deanbo
  • · Replies 19 ·
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19

Undergrad Magnetic field through ferrous material and across air gap

  • Stugotz99
  • · Replies 4 ·
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4

Graduate Magnetism & Photons: Mediating Electromagnetism & Spin

  • fgsfds
  • · Replies 5 ·
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5

Graduate What is the true source of energy in an EM wave?

  • mysearch
  • · Replies 47 ·
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47

Graduate Time varying magnetic field and electron

  • pedro-filipe
  • · Replies 5 ·
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5

Undergrad When should the integral be used for Gauss's law?

  • |<ings
  • · Replies 13 ·
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13

High School Creating Electricity From Magnets

  • deanbo
  • · Replies 8 ·
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8

High School Is Brightness of a Bulb Dependent on Resistance and Current?

  • seto6
  • · Replies 4 ·
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4

Undergrad The Skin Effect in AC Circuits

  • atrevelyn314
  • · Replies 3 ·
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3

High School Gravitational / Magnetic Potential Energy Question

  • RestlessMind
  • · Replies 7 ·
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7

Undergrad Can you cancel a magnetic field with another magnetic field to reach near zero teslas?

  • cragar
  • · Replies 10 ·
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10

Graduate How does an electret retain its charge for years without decreasing?

  • arul_k
  • · Replies 3 ·
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3

High School How does a generator produce AC current?

  • Cycloned
  • · Replies 12 ·
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12

Graduate Explaining the "Causation Problem" of Abraham-Lorentz Force

  • neworder1
  • · Replies 12 ·
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12

Graduate Maxwell eqs: 8 eqs for 6 unknowns - too many eqs?

  • pellman
  • · Replies 4 ·
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4

Undergrad How do current, charge and voltage change during capacitor charging and discharging?

  • ojsimon
  • · Replies 15 ·
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15

Undergrad Capacitor charging/discharging for R=0

  • amith_elec
  • · Replies 8 ·
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8

Undergrad Negative electric permittivity

  • eraserxp
  • · Replies 1 ·
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1

Graduate Changing/Controling relative permeability

  • jupiter13
  • · Replies 1 ·
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1

Graduate Can Magnetic Force Perform Work?

  • Anamitra
  • · Replies 48 ·
2
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48

High School Magnetic flux density vs magnetic flux

  • chanderjeet
  • · Replies 5 ·
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5

Undergrad Understanding Magnetism: Debunking the Myth of All Matter Being Magnetic

  • darkchild
  • · Replies 5 ·
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5

Graduate Magnetic Linear Accelerator Questions

  • Yankus
  • · Replies 5 ·
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5

High School The effect of an external electric field on water

  • Arghablarg
  • · Replies 1 ·
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1

High School What is the resistance of a non-ohmic resistor in v-i graph

  • chetan:)
  • · Replies 5 ·
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5

Graduate Point charges in non-inertial reference frames

  • Ertosthnes
  • · Replies 2 ·
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2

Undergrad When is dA not integrated into A for Gauss' law?

  • glennpagano
  • · Replies 4 ·
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4

Graduate Potential of a long charged wire

  • Taturana
  • · Replies 6 ·
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6

High School Electronic Devices & AM Radio Disturbance: Why It Happens

  • element41$
  • · Replies 1 ·
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1

Graduate Boundary condition for Maxwell equations

  • paweld
  • · Replies 2 ·
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2

Undergrad How do you find the B field between finite wires?

  • Frostfire
  • · Replies 1 ·
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1

Undergrad Can Sound Exist Beyond 20kHz and Become Something Else?

  • Evilinside
  • · Replies 9 ·
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9

Graduate Covariant Maxwell Equations in Materials

  • EsPg
  • · Replies 5 ·
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5

Undergrad Magnetic Vehicle: Possibilities on Earth's Atmosphere

  • berry05
  • · Replies 1 ·
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1

High School What is the relationship between electric potential and work done?

  • ojsimon
  • · Replies 3 ·
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3

High School Determining Magnet Strength: Formula & Factors Explained

  • the
  • · Replies 2 ·
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2

Undergrad Electric Generator: How to use 2 Motors & a Pully System

  • berry05
  • · Replies 38 ·
2
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38

High School Is it possible to get electrocuted by touching this electric line?

  • Simfish
  • · Replies 8 ·
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8

Graduate Is the Definition of Amperes and Epsilon0 Arbitrary?

  • diagopod
  • · Replies 7 ·
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7

Undergrad Why is Coulombs Constant Written as 1/(4*pi*epsilon0)?

  • salmannsu
  • · Replies 3 ·
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3

Graduate Several Questions About Electromagnetic Waves

  • jaketodd
  • · Replies 13 ·
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13

Undergrad Power Transformer Control: Generator or Cable?

  • ahSiang
  • · Replies 1 ·
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1

Undergrad Non uniform charge distribution on conductor surface

  • vinaysaxena93
  • · Replies 2 ·
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2

Undergrad Is There an Equation for the Force on a Charged Particle in a Magnetic Field?

  • Kracatoan
  • · Replies 4 ·
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4

Graduate Maxwell's Equations for nonlinear media

  • MathRyan
  • · Replies 13 ·
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13