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High School What Causes the Vibration and Humming in Electromagnets?

  • Neight
  • · Replies 16 ·
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16

Graduate Intuitive/conceptual understanding of magnetic vector potential

  • HJ Farnsworth
  • · Replies 2 ·
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2

Graduate Question about energy in EM waves

  • mathplease
  • · Replies 2 ·
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2

Undergrad Thevenin Equivalent Circuits with Dependent Source

  • simba9071
  • · Replies 3 ·
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3

Undergrad Gravitational potential energy and Electric potential energy

  • vishuboy
  • · Replies 2 ·
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2

High School Query regarding knight rider (electronics)

  • imvaibhav
  • · Replies 9 ·
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9

Graduate Tiny-tim's proof: force on a capacitor plate

  • tiny-tim
  • · Replies 10 ·
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10

Graduate Could a pure-electric laser-propelled space rocket be mere decades away?

  • kmarinas86
  • · Replies 1 ·
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1

Graduate What happens to an electron created inside a conductor in an electric field?

  • BrINClHOF
  • · Replies 6 ·
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6

High School Earth's Magnetic Field: Vertical Direction

  • brainyman89
  • · Replies 1 ·
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1

Undergrad What is the definition of the electric field according to Purcell's textbook?

  • y.moghadamnia
  • · Replies 2 ·
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2

High School How Do I Calculate Coulomb's Law for Fractional Electrical Charges?

  • robertroman10
  • · Replies 5 ·
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5

High School Effect of alternating current (a.c.) on a capacitor

  • PainterGuy
  • · Replies 16 ·
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16

Undergrad Finding the Null Point with a Galvanometer: Advice Needed

  • labview1958
  • · Replies 8 ·
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8

Undergrad Two questions. 180 degrees out of phase.

  • Evil Bunny
  • · Replies 6 ·
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6

High School Basic question regarding electricity

  • sm8717
  • · Replies 6 ·
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6

Undergrad So, will the bulb light up in this parallel circuit with a zero ohm resistor?

  • Kyoma
  • · Replies 8 ·
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8

Undergrad How Does a Hairdryer Use Less Current Despite High Home Voltage?

  • ethan12
  • · Replies 2 ·
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2

Graduate Electrodynamics and chemistry empirical formula

  • madah12
  • · Replies 5 ·
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5

High School Tesla Coil Shocks: Health Effects & Risk

  • you878
  • · Replies 5 ·
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5

Graduate Can a time-varying magnetic field emulate the electric field of a point charge?

  • uby
  • · Replies 3 ·
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3

Undergrad Do Fresnell equations apply to other waves than EM waves?

  • DragonPetter
  • · Replies 5 ·
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5

High School Understanding Ionization Energy, E- Negativity, and Electron Affinity

  • lokobreed
  • · Replies 2 ·
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2

Graduate Defining dimensions of a linear eddy current brakes permanent magnets

  • os220
  • · Replies 2 ·
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2

Undergrad Induced Current in a Loop - Changing B Field

  • jds10011
  • · Replies 2 ·
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2

High School Are Currents Summed in Parallel Battery Circuits?

  • PainterGuy
  • · Replies 6 ·
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6

Undergrad What is the relationship between electrical power and torque in a generator?

  • Evil Bunny
  • · Replies 5 ·
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5

Undergrad What is the difference between eddy current and induced current?

  • brainyman89
  • · Replies 32 ·
2
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32

Graduate Is Malus' Law a law, or does it derive from Maxwells equations?

  • Tez
  • · Replies 3 ·
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3

Graduate Magnetic Field of Magnetic Dipole Moment

  • Morto
  • · Replies 8 ·
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8

Undergrad DC & RC Circuits: Proving Energy Distribution

  • jm2612
  • · Replies 1 ·
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1

High School Ohmic conductor, when R tends to zero I=V/R

  • PainterGuy
  • · Replies 15 ·
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15

Undergrad Voltage vs Potential Energy Formulas

  • [V]
  • · Replies 5 ·
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5

Undergrad Are Photons Bigger Than Electrons?

  • noname2020x
  • · Replies 2 ·
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2

Graduate Maxwell's tensorial equations.

  • MathematicalPhysicist
  • · Replies 7 ·
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7

High School Why Do the Earth's Magnetic Poles Differ from the Geographic Poles?

  • brainyman89
  • · Replies 1 ·
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1

Undergrad Falling body with air resistance

  • chengbin
  • · Replies 6 ·
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6

Undergrad Reduction of magnetic repulsion

  • Skeet_man
  • · Replies 1 ·
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1

Graduate Electrostatic containment of negatively charged gas

  • Landon
  • · Replies 7 ·
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7

Graduate Magnetic field extraction of positive ions

  • Landon
  • · Replies 3 ·
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3

High School More wavelenght has an electromagnetic wave the minus frequency

  • scientifico
  • · Replies 9 ·
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9

Undergrad Distribution of charge wrt static electricity

  • GRB 080319B
  • · Replies 4 ·
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4

Undergrad Electricity and Magnetism: What Causes B Fields from Moving Charges?

  • cragar
  • · Replies 5 ·
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5

Graduate Can Gamma Rays & Other Electromagnetive Waves have particle's characteristics?

  • P. Brien
  • · Replies 4 ·
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4

Graduate Electronic structure of states of matter

  • GRB 080319B
  • · Replies 1 ·
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1

Graduate How can we define material properties using Maxwell's equations?

  • Stretto
  • · Replies 4 ·
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4

Undergrad EM Waves: Why No Electromagnetic Wave Production?

  • nipiano93
  • · Replies 6 ·
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6

High School Can Two Batteries Simultaneously Act as Both the Source and Load in a Circuit?

  • Evil Bunny
  • · Replies 4 ·
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4

Graduate Energy location of Electromagnetic and Charge-current Fields.

  • Phrak
  • · Replies 18 ·
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18

Undergrad Capacitor and 1 British Pound MAGNET

  • babushka
  • · Replies 1 ·
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1

Graduate Where does charge go in this van de Graaff generator?

  • uby
  • · Replies 4 ·
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4

High School Electromagnetic Waves (Experiment)

  • Vegeta
  • · Replies 2 ·
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2

Undergrad Electric field in a more difficult situation

  • umciukas
  • · Replies 1 ·
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1

Undergrad TI RFID Evaluation Kit - Why Can't Tags be Placed on Metal?

  • citizencoolgu
  • · Replies 1 ·
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1

Undergrad Simple kirchhoff 2nd rule problem

  • PainterGuy
  • · Replies 4 ·
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4

Undergrad Expression for Angular Frequency

  • zorro
  • · Replies 12 ·
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12

Undergrad Why is Biot-Savart Law Zero for Cylinderical Uniform Current Density?

  • hokhani
  • · Replies 2 ·
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2

Undergrad Can you weaken a magnetic field with the peresnce of ferris materials?

  • Gabe21
  • · Replies 1 ·
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1

Undergrad Q: How does short circuiting affect the potential difference in a circuit?

  • PainterGuy
  • · Replies 7 ·
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7

Undergrad Basic Capacitors: What Happens When a Thick Slab is Inserted?

  • michael650
  • · Replies 2 ·
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2

Undergrad Converting Ions into Electricity

  • Drakkith
  • · Replies 2 ·
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2

Undergrad Frequency of the carrier wave changed during amplitude modulation

  • Pranav Jha
  • · Replies 5 ·
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5

Undergrad Current Sources in Superposition Theorem

  • JSGandora
  • · Replies 1 ·
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1

Graduate Solving Maxwell's Equations: Wave Equation in Vacuum

  • fluidistic
  • · Replies 5 ·
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5

Undergrad Does waving a magnet back and fourth produce an EM wave?

  • pergradus
  • · Replies 1 ·
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1

High School Magnetic moment of compass needle?

  • shoestring
  • · Replies 3 ·
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3

Graduate Dimensions of integral of voltage curve

  • SW VandeCarr
  • · Replies 1 ·
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1

Undergrad What does a string vibrating at a frequency of 196Hz look like visually?

  • deadstar33
  • · Replies 5 ·
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5

Graduate Create a Ball of Electrons: What Would You See?

  • TheTankEngine
  • · Replies 7 ·
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7

High School Understanding Power Dissipation in Parallel Resistors

  • IDGAF
  • · Replies 1 ·
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1

Graduate Inductance at the centre of circular coil

  • muhammadmorsi
  • · Replies 1 ·
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1

Graduate Exploring the Relationship Between B and E

  • zeromodz
  • · Replies 5 ·
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5

Graduate Is a Maxwell Velocity Distribution Possible in a Newtonian Gravitational Field?

  • Gavroy
  • · Replies 1 ·
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1

Graduate Electronic properties of graphene

  • Ironside
  • · Replies 1 ·
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1

Undergrad Capacitance in a Cylinder: Which Direction is the Voltage Calculated?

  • sebby_man
  • · Replies 4 ·
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4

Undergrad Question on inductance with magnetic material core.

  • yungman
  • · Replies 3 ·
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3

Graduate Lorentz force on superconducting wire?

  • Terawatt
  • · Replies 15 ·
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15

Graduate Microscopic electric fields in a conductor

  • issacnewton
  • · Replies 5 ·
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5

Undergrad Ordering Wires by Resistance: R, R/2, R/2 & 2L, R & 2L

  • JSGandora
  • · Replies 12 ·
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12

Graduate How Does Poynting's Theorem Explain Ohmic Loss?

  • yungman
  • · Replies 2 ·
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2

Graduate Acceleration of a Charged Particle

  • jmatejka
  • · Replies 3 ·
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3

High School Why Do Magnets Attract Metals?

  • Jarfi
  • · Replies 4 ·
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4

High School Electric field between two charged plates

  • umciukas
  • · Replies 2 ·
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2

High School How can I calculate the voltage output of a wind turbine?

  • sooty1892
  • · Replies 1 ·
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1

Graduate Understanding Relative Electricity: An Electron's Perspective

  • sci-guy
  • · Replies 4 ·
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4

Graduate Rectangular wave guide, TE01 mode

  • Phrak
  • · Replies 23 ·
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23

High School Current Direction vs. Potential Difference

  • makino.sh
  • · Replies 2 ·
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2

High School Infrared Waves vs. Radio Waves Frequency

  • jfio93
  • · Replies 3 ·
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3

Undergrad Whats the Concept behind change of electric/magnetic flux ?

  • khamaar
  • · Replies 8 ·
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8

Graduate How Do Split Brake Discs Affect Eddy Currents and Braking Force?

  • type_writer
  • · Replies 4 ·
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4

Undergrad Capacitor in AC Circuit: Why there is such relation of current and voltage?

  • akmafia001
  • · Replies 8 ·
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8

Graduate Could a Bar Magnet on Feynman's Ratchet Generate AC Current?

  • cragar
  • · Replies 18 ·
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18

Graduate Does an electrically charged surface maintain an excess charge if heated?

  • uby
  • · Replies 3 ·
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3

Undergrad Basic Gaussian Surface Conceptual Problem

  • fysicsandphol
  • · Replies 2 ·
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2

Graduate Confused about Poynting Theorem and Retarded field.

  • yungman
  • · Replies 4 ·
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4

Graduate Magnetic Enrgy (B^2/2u or H^2/8pi)

  • asheg
  • · Replies 4 ·
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4

Undergrad Which component of an electromagnetic wave is responsible for visible effect?

  • nipiano93
  • · Replies 23 ·
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23

High School Understanding Voltage: Common Questions and Answers in Basic Physics

  • Kyoma
  • · Replies 4 ·
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4

High School Nice Electrostatic Experiments

  • Septim
  • · Replies 4 ·
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4

Undergrad Using electromagnetic forces to propel large masses, ie maglevs or railguns

  • zewnten
  • · Replies 2 ·
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2