Electromagnetism Forum

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High School Discovering the Mystery of Music from a D Battery and Steel Wire

  • Nivlac2425
  • · Replies 3 ·
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3

Graduate Demagnetization of a permanent magnet

  • Harmony
  • · Replies 2 ·
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2

Undergrad I need an equation for Capacitors spherical

  • SoulofLoneWlf
  • · Replies 1 ·
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1

Graduate What is the physical explanation and results for a negative dielectric constant?

  • TheDestroyer
  • · Replies 10 ·
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10

Undergrad Harnessing energy from piezioelectric roadways

  • fireseed
  • · Replies 13 ·
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13

Undergrad Electron Flow Creates Magnetic Field Around Coil with Permanent Magnet

  • likephysics
  • · Replies 11 ·
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11

Graduate Potential energy of point charges

  • BobFroehlich
  • · Replies 4 ·
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4

Undergrad Edison's Electric Companies: Understanding DC Processes

  • vectordog
  • · Replies 4 ·
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4

Undergrad Concept of an area vector when finding magnetic flux

  • RobSoko315
  • · Replies 4 ·
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4

Undergrad Magnetic Polarization in Earth's Magnetic Field - Kazakhstan

  • p.tryon
  • · Replies 5 ·
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5

Graduate Proving Q & I: Euler's Formula Needed

  • SoulofLoneWlf
  • · Replies 2 ·
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2

High School What is Voltage? Answers to Your Questions

  • IvaNMK
  • · Replies 7 ·
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7

Graduate Maxwell's equations and Coulomb's law

  • kof9595995
  • · Replies 22 ·
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22

Graduate Question on the constant current in electric circuits. [ Not homework ]

  • Nanyang
  • · Replies 10 ·
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10

Undergrad Dielectric Constants & Breakdown of Various Materials

  • Agnostic
  • · Replies 3 ·
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3

Graduate Conductors & Fields: Feynman's Argument Explained

  • atavistic
  • · Replies 3 ·
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3

High School Magnetic fields such as a field from a neodymium magnet?

  • Chemics
  • · Replies 11 ·
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11

High School Charge balance in the universe?

  • chis
  • · Replies 5 ·
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5

Undergrad Making/Inducing/Forming a current

  • max1546
  • · Replies 1 ·
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1

Graduate Maxwell Equations in Tensor notation

  • Karliski
  • · Replies 6 ·
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6

Undergrad What is the Relationship Between Electric Field and Potential?

  • shirel
  • · Replies 2 ·
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2

Undergrad Question about electrons, energy levels and orbits

  • LennoxLewis
  • · Replies 5 ·
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5

Undergrad Where Does the Charge Go When Connected to a Grounded Capacitor?

  • Nanoath
  • · Replies 5 ·
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5

Graduate Twisted Coil in a Magnetic Field

  • Leitmotiv
  • · Replies 5 ·
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5

High School Why can't an object gain a (+) charge when rubbed against another?

  • Elbobo
  • · Replies 7 ·
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7

Graduate Can Forces Like Magnetism Be Considered Fictitious in a Rotating Frame?

  • snoopies622
  • · Replies 13 ·
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13

Undergrad Dielectric constant for aliminium nitride

  • sallyishyper
  • · Replies 1 ·
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1

Undergrad Cleaning Viewing Ports on a Magnetron System

  • djqcquinn
  • · Replies 7 ·
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7

High School Multimeter measures resistance when there’s no battery attached?

  • xswtxoj
  • · Replies 1 ·
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1

Undergrad Interesting thought about simple induction

  • Jdo300
  • · Replies 4 ·
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4

Undergrad Understanding Amplitude Modulation for Radios

  • MadmanMurray
  • · Replies 1 ·
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1

Graduate Magnetism and lagrange formulation of mechanics

  • Nick R
  • · Replies 1 ·
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1

High School Understanding the Difference: Resistivity vs. Resistance

  • jimbo71
  • · Replies 2 ·
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2

Undergrad Are a Battery's EMF and Terminal Voltage the Same?

  • jimbo71
  • · Replies 2 ·
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2

High School How AC Circuits Work: Explained for Beginners

  • KYPOWERLIFTER
  • · Replies 13 ·
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13

Undergrad Can a Tesla Turbine Improve Paddling Efficiency on a Kayak?

  • Dyte
  • · Replies 6 ·
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6

Undergrad How Can I Calculate the Force Produced by an Electromagnet?

  • roldy
  • · Replies 4 ·
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4

Undergrad Does a Capacitor Create an Electric Field Between its Wire and Ground?

  • gareth
  • · Replies 5 ·
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5

Undergrad Absolute voltage values at battery terminals

  • klng
  • · Replies 3 ·
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3

Undergrad Voltage of Capacitors in Series, a widely held assumption

  • Hirams_bro
  • · Replies 3 ·
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3

Undergrad Is the electric field constant between two charged plates?

  • n0083
  • · Replies 4 ·
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4

Graduate Method of Images Question (Concave Geometries)

  • ^_^physicist
  • · Replies 2 ·
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2

Undergrad Cylindrical Symmetry - Gauss's Law

  • nissan4l0
  • · Replies 5 ·
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5

Undergrad Faraday's law + bicycle training

  • traycerb
  • · Replies 2 ·
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2

Undergrad Does the voltage reading across a rotating DC motor decrease due to back EMF?

  • woodfich
  • · Replies 7 ·
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7

Undergrad Can the conservation law be violated in electromagnetic induction?

  • Tominator
  • · Replies 7 ·
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7

Graduate Does accelerated magnetic charge also radiate?

  • spidey
  • · Replies 25 ·
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25

Graduate Electromagnetic energy is not Gauge invariant?

  • JustinLevy
  • · Replies 4 ·
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4

Undergrad Magnetic Vector Potential Around a Wire Carrying Current

  • snoopies622
  • · Replies 3 ·
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3

High School Do You Feel Air Resistance at 120 mph?

  • rob2791
  • · Replies 1 ·
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1

High School Measuring Frequency: Equipment & Best Way for Newbies

  • paulseldon
  • · Replies 10 ·
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10

Graduate Homemade Electrical/Mechanical/Physics Trainer

  • jmatejka
  • · Replies 2 ·
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2

Graduate How to create monopole magnetic material?

  • thinhnghiem
  • · Replies 33 ·
2
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33

Undergrad Question about charge in a circuit

  • gangsta316
  • · Replies 19 ·
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19

Graduate Electric and magnetic field energy

  • Peeter
  • · Replies 7 ·
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7

Undergrad Faraday's law and induced emf in a loop

  • kobulingam
  • · Replies 4 ·
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4

Undergrad Why are there 2 definitions of Magnetic Moment?

  • tessx
  • · Replies 4 ·
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4

Undergrad Electric Field Equation Hollow Cylinder

  • n0083
  • · Replies 7 ·
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7

Graduate Field line near the electrodes for the different electrode

  • xswtxoj
  • · Replies 1 ·
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1

High School EM Waves: Charged or Not? Why?

  • vbalouria
  • · Replies 4 ·
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4

Graduate How Does Magnetron Power Influence Microwave Frequency and Amplitude?

  • CL39
  • · Replies 1 ·
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1

High School Does filament size or resistance affect the brightness of a lightbulb?

  • southern69
  • · Replies 3 ·
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3

Undergrad Calculating watts per square foot

  • Bacat
  • · Replies 3 ·
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3

Undergrad Building an HV AC capacitor for a tesla coil

  • salter
  • · Replies 1 ·
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1

Graduate Neurology / Electromagnetic/ Frequency / Broadcasting question on Physics

  • Cyrus80772
  • · Replies 1 ·
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1

Undergrad Magnetic Field of a Coil w/ N Spire: Determining Off-Axis Fields

  • cataldo
  • · Replies 3 ·
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3

Graduate Wheeler's and Feynman's retarded and advanced waves.

  • jdg812
  • · Replies 4 ·
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4

Graduate Electrons and positrons free fall within a superconducting cylinder

  • lalbatros
  • · Replies 2 ·
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2

Graduate Electrodynamic checks of the equivalence principle

  • lalbatros
  • · Replies 2 ·
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2

High School Why Do We Get Zapped by Door Knobs? Understanding the Science Behind It

  • ice109
  • · Replies 4 ·
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4

High School Why is earth pin longer than other two in a plug top?

  • Abhishakes
  • · Replies 5 ·
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5

High School Double Pole Switch Used After KWH Metre in Homes

  • Abhishakes
  • · Replies 3 ·
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3

High School Why the base of an electric iron is made thick and heavy?

  • Abhishakes
  • · Replies 3 ·
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3

High School Why does the resistance decreases with increase in temp for semi- conductors?

  • Abhishakes
  • · Replies 1 ·
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1

Undergrad Apply Kirchoff's rules with a non-ohmic resistor?

  • Hobnob
  • · Replies 6 ·
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6

Graduate Electrodynamics: quaternionic potential?

  • the_viewer
  • · Replies 3 ·
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3

Undergrad Why is Electric Potential Energy Defined in the Y-Direction Only?

  • Seraph404
  • · Replies 1 ·
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1

Undergrad Angular momentum in an electrostatic field

  • adjklx
  • · Replies 1 ·
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1

Graduate What Force Does an Object Experience Inside a Solenoid?

  • rmatiass
  • · Replies 3 ·
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3

Undergrad How does high voltage decrease energy loss in a wire

  • DeepSeeded
  • · Replies 11 ·
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11

Graduate What is the effect of a wire with current on Ampère's circuital law?

  • valjok
  • · Replies 2 ·
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2

Graduate Why Does the Electron have Mass?

  • Physics Rocks
  • · Replies 2 ·
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2

Graduate Angular momentum in electric field and magnetic field

  • freehuman79
  • · Replies 5 ·
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5

Undergrad Electromagnet repulsion increased significantly

  • Gdarnall
  • · Replies 2 ·
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2

Graduate Why Are There Two Forms of the Poisson Equation?

  • mysubs
  • · Replies 4 ·
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4

High School What happens to the current when lightning strikes a swimming pool?

  • klng
  • · Replies 2 ·
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2

High School Earth`s magnetic field and permanent magnets

  • Tominator
  • · Replies 2 ·
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2

Graduate Finding Charge Density of Solution and then Amps

  • Shelnutt2
  • · Replies 1 ·
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1

High School What Are the Best Electromagnetism Project Ideas for 9th Grade AP Physics?

  • Bravenewworld
  • · Replies 1 ·
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1

Undergrad Propagation sequencing in series circuit?

  • rcgldr
  • · Replies 3 ·
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3

Graduate What Drives the Quest for Quantum Gravity?

  • Pjpic
  • · Replies 4 ·
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4

Undergrad Best efficiency to convert Kinetic into Electric

  • Bacat
  • · Replies 7 ·
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7

High School Any relationship between light from the sun and electricity?

  • templedog
  • · Replies 6 ·
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6

Undergrad Electric Power: P=VI Explained

  • freeload
  • · Replies 4 ·
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4

Graduate Maxwell's Demon: Clarifying Arguments Against 2nd Law

  • renz
  • · Replies 2 ·
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2

Undergrad Help Needed: Understanding Gauss's Law and Electric Field

  • eRa
  • · Replies 4 ·
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4

Graduate Electric field in super conductor

  • spidey
  • · Replies 2 ·
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2

High School Why is it that very low frequency signals cannot be transmitted by antennas?

  • AML195
  • · Replies 13 ·
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13

Graduate Electric Wire in Earth's Magnetic Field: Tapping into Electromagnetic Energy

  • crx
  • · Replies 17 ·
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17

Graduate Permanent Magnet Hoverboard and base?

  • bodkin77
  • · Replies 18 ·
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18