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High School Capacitance of parallel plates as a function of distance

Apr 20, 2008 · Replies 1 · Apr 20, 2008

Replies: 1

Views: 2K

Undergrad Testing the Magnetism of a Solenoid & Galvanometer

Apr 19, 2008 · Replies 3 · Apr 20, 2008

Replies: 3

Views: 3K

Undergrad Why Does Overshoot Occur in Electronics?

Apr 20, 2008 · Replies 1 · Apr 20, 2008

Replies: 1

Views: 4K

High School How much power is needed to hold a 500g object stationary against gravity?

Apr 17, 2008 · Replies 9 · Apr 19, 2008

Replies: 9

Views: 5K

High School Extending the range of electro magnets? Can it be done?

Apr 18, 2008 · Replies 8 · Apr 18, 2008

Replies: 8

Views: 6K

High School Can someone please explain magnetic pressure to me?

Apr 13, 2008 · Replies 2 · Apr 18, 2008

Replies: 2

Views: 2K

Undergrad Magnetic lines of force and magnetic flux

Apr 13, 2008 · Replies 9 · Apr 18, 2008

Replies: 9

Views: 22K

Undergrad Capacitance Experiment: Determining Time Constant and V_0 Value

Jan 8, 2008 · Replies 10 · Apr 17, 2008

Replies: 10

Views: 5K

Undergrad What is the source of electrons in generators and how are they replenished?

Apr 15, 2008 · Replies 6 · Apr 16, 2008

Replies: 6

Views: 3K

High School Alternating current versus direct current

Apr 14, 2008 · Replies 18 · Apr 15, 2008

Replies: 18

Views: 9K

High School Which Circuit Drains Batteries Faster: Series or Parallel?

Apr 14, 2008 · Replies 5 · Apr 15, 2008

Replies: 5

Views: 3K

High School Why do resistors in series receive the same current

Apr 12, 2008 · Replies 8 · Apr 15, 2008

Replies: 8

Views: 20K

Undergrad Capacitors and breakdown voltages

Apr 13, 2008 · Replies 4 · Apr 15, 2008

Replies: 4

Views: 23K

High School What are Ampere-turns and Ampere turns per meter?

Apr 13, 2008 · Replies 2 · Apr 15, 2008

Replies: 2

Views: 44K

Graduate Can someone help me explain these two problems better?

Apr 10, 2008 · Replies 5 · Apr 14, 2008

Replies: 5

Views: 6K

Undergrad Is Negative Electrical Potential a Real Concept in Circuits and Batteries?

Apr 11, 2008 · Replies 9 · Apr 14, 2008

Replies: 9

Views: 4K

Undergrad If E field points up, which way does B field point?

Apr 14, 2008 · Replies 2 · Apr 14, 2008

Replies: 2

Views: 2K

High School Alternating Current vs Direct Current

Jun 14, 2006 · Replies 17 · Apr 14, 2008

Replies: 17

Views: 156K

Graduate Upper cutoff frequency for rectangular waveguide

Apr 14, 2008 · Replies 1 · Apr 14, 2008

Replies: 1

Views: 8K

Undergrad Magnetic field and airplane scenario.

Apr 13, 2008 · Replies 6 · Apr 14, 2008

Replies: 6

Views: 8K

High School Parallel Current-Conducting rods

Apr 13, 2008 · Replies 2 · Apr 13, 2008

Replies: 2

Views: 2K

Graduate Geomagnetic Propulsion: Feasibility & Detection

Apr 11, 2008 · Replies 6 · Apr 13, 2008

Replies: 6

Views: 6K

Graduate Ferromagnetic effect at smaller/larger grain size

Apr 13, 2008 · Replies 2 · Apr 13, 2008

Replies: 2

Views: 3K

Graduate Mass & Electric/Magnetic Field Relationship

Apr 11, 2008 · Replies 1 · Apr 12, 2008

Replies: 1

Views: 2K

High School Why Doesn't Voltage Always Decrease When Charges Move?

Apr 11, 2008 · Replies 11 · Apr 12, 2008

Replies: 11

Views: 3K

High School When I see an electrical arc ,what am I really seeing?

Apr 12, 2008 · Replies 4 · Apr 12, 2008

Replies: 4

Views: 3K

Graduate Are magnetic fields 'conservative'

Apr 9, 2008 · Replies 6 · Apr 12, 2008

Replies: 6

Views: 8K

High School Why an electro magnet use energy?

Apr 10, 2008 · Replies 21 · Apr 12, 2008

Replies: 21

Views: 9K

Undergrad Shape and speed of electromagnetic waves

Apr 7, 2008 · Replies 19 · Apr 12, 2008

Replies: 19

Views: 9K

Undergrad Does Moving a Magnetic Field Affect a Stationary Charged Particle?

Apr 10, 2008 · Replies 9 · Apr 11, 2008

Replies: 9

Views: 7K

Undergrad How Cooulomb's law follows from Gauss' law?

Apr 9, 2008 · Replies 5 · Apr 11, 2008

Replies: 5

Views: 3K

High School Can a single conductor be used as capacitor ?

Apr 9, 2008 · Replies 1 · Apr 10, 2008

Replies: 1

Views: 4K

Graduate How Does the Second Uniqueness Theorem Determine the Electric Field in a Volume?

Apr 8, 2008 · Replies 5 · Apr 9, 2008

Replies: 5

Views: 4K

Undergrad Understanding Lenz's Law and Induced Currents

Mar 31, 2008 · Replies 4 · Apr 8, 2008

Replies: 4

Views: 22K

Undergrad Aerodynamics and wind resistance of racing cars

Apr 8, 2008 · Replies 1 · Apr 8, 2008

Replies: 1

Views: 3K

Graduate Gauss Law Anomaly: Potential Across a Capacitor

Apr 6, 2008 · Replies 4 · Apr 8, 2008

Replies: 4

Views: 3K

Graduate Calculating/estimating Eddy currents due to B-field

Apr 4, 2008 · Replies 1 · Apr 8, 2008

Replies: 1

Views: 4K

Undergrad Proof of Induction: Induced Voltage in Any Rod or Circuit

Apr 7, 2008 · Replies 2 · Apr 7, 2008

Replies: 2

Views: 2K

Undergrad What happens when you put inert electrodes @ 220V/50Hz in tap water?

Apr 3, 2008 · Replies 6 · Apr 7, 2008

Replies: 6

Views: 8K

High School Why is the standard household AC frequency 60hz?

Apr 5, 2008 · Replies 16 · Apr 6, 2008

Replies: 16

Views: 4K

High School Is Induced E.M.F a Force? Understanding Eddy Currents

Apr 6, 2008 · Replies 3 · Apr 6, 2008

Replies: 3

Views: 6K

Graduate What is the Physical Significance of Gauge Transformations in Electromagnetism?

Apr 5, 2008 · Replies 5 · Apr 6, 2008

Replies: 5

Views: 5K

Undergrad Does a Magnetic Field Do Work on Electrons in a Wire?

Apr 3, 2008 · Replies 7 · Apr 5, 2008

Replies: 7

Views: 3K

Graduate Question - electron mass & magnetic moment

Apr 5, 2008 · Replies 2 · Apr 5, 2008

Replies: 2

Views: 2K

Graduate The E Field Around a Wire with a Constant Current

Apr 4, 2008 · Replies 4 · Apr 4, 2008

Replies: 4

Views: 2K

High School Magnets vibrating near a current?

Apr 4, 2008 · Replies 1 · Apr 4, 2008

Replies: 1

Views: 4K

Graduate Can Magnetic Field Strength Decrease with Distance in Plasmas?

Apr 3, 2008 · Replies 2 · Apr 4, 2008

Replies: 2

Views: 2K

Undergrad Back EMF (electromagnetic induction)

Apr 3, 2008 · Replies 2 · Apr 3, 2008

Replies: 2

Views: 8K

Undergrad How do Electrons perform work in circuits?

Mar 25, 2008 · Replies 32 · Apr 2, 2008

2

Replies: 32

Views: 11K

Undergrad What IS a field e.g. magnetic field

Mar 12, 2008 · Replies 30 · Apr 2, 2008

2

Replies: 30

Views: 6K

Undergrad Magnetics of transformers and induction in metals

Apr 2, 2008 · Replies 3 · Apr 2, 2008

Replies: 3

Views: 2K

Undergrad Exploring the Effects of Combining Small Magnets in a Cube or Sphere Shape

Mar 26, 2008 · Replies 4 · Apr 2, 2008

Replies: 4

Views: 2K

Undergrad Charging a capacitor through a high resistance

Mar 28, 2008 · Replies 7 · Apr 2, 2008

Replies: 7

Views: 22K

High School Question concerning magnetic fields

Apr 2, 2008 · Replies 3 · Apr 2, 2008

Replies: 3

Views: 2K

Undergrad What is the role of velocity in the equation F = qv x B?

Mar 27, 2008 · Replies 13 · Apr 2, 2008

Replies: 13

Views: 4K

Graduate Why does the flux rule work in all cases?

Mar 23, 2008 · Replies 4 · Apr 1, 2008

Replies: 4

Views: 5K

Undergrad Is the Magnetic Field Non-Conservative in Nature?

Mar 31, 2008 · Replies 12 · Apr 1, 2008

Replies: 12

Views: 9K

Graduate Induced Electric Fields and EMF

Mar 30, 2008 · Replies 4 · Apr 1, 2008

Replies: 4

Views: 5K

High School Electric charges and large bodies

Apr 1, 2008 · Replies 2 · Apr 1, 2008

Replies: 2

Views: 2K

High School Static Electricity: Reduce Shock by Holding a Doorknob

Mar 31, 2008 · Replies 1 · Apr 1, 2008

Replies: 1

Views: 3K

Graduate Deriving Poynting Vector from EM Waves

Mar 30, 2008 · Replies 3 · Mar 31, 2008

Replies: 3

Views: 4K

Undergrad Charge Conservation: A+2 & B+7 → A+5 & B+5

Mar 30, 2008 · Replies 5 · Mar 30, 2008

Replies: 5

Views: 3K

Graduate Question regarding electromagnetic interaction

Mar 29, 2008 · Replies 4 · Mar 30, 2008

Replies: 4

Views: 2K

Graduate Question on Magnetic polarization

Mar 22, 2008 · Replies 1 · Mar 30, 2008

Replies: 1

Views: 2K

High School Question about resistance in a circuit

Mar 29, 2008 · Replies 2 · Mar 30, 2008

Replies: 2

Views: 2K

Undergrad Why photon with no charge produces force on charges?

Mar 29, 2008 · Replies 7 · Mar 29, 2008

Replies: 7

Views: 2K

High School Why do two point charges with one being zero still exhibit a Coulomb force?

Mar 29, 2008 · Replies 9 · Mar 29, 2008

Replies: 9

Views: 3K

Undergrad Moving while lighting, will be induced current in me?

Jan 20, 2008 · Replies 22 · Mar 29, 2008

Replies: 22

Views: 4K

Undergrad How does a magnetic crane lift a car if the magnetic force doesn't do any work?

Mar 26, 2008 · Replies 6 · Mar 28, 2008

Replies: 6

Views: 6K

High School What Causes the Charging Sound of a Capacitor?

Mar 27, 2008 · Replies 1 · Mar 27, 2008

Replies: 1

Views: 4K

Undergrad Amazing Physics Demonstration - Unravelling the Mystery

Mar 26, 2008 · Replies 5 · Mar 27, 2008

Replies: 5

Views: 3K

High School Which electron travels from - to +?

Mar 26, 2008 · Replies 2 · Mar 27, 2008

Replies: 2

Views: 2K

Undergrad What is charge and what are the reality of fields?

Mar 20, 2008 · Replies 16 · Mar 26, 2008

Replies: 16

Views: 4K

Graduate Reflux still at the molecular level?

Mar 23, 2008 · Replies 3 · Mar 24, 2008

Replies: 3

Views: 5K

High School First Leyden Jar - experimenting.

Feb 16, 2008 · Replies 1 · Mar 24, 2008

Replies: 1

Views: 4K

Graduate Relation between H and B fields, and D and E fields

Dec 7, 2006 · Replies 22 · Mar 24, 2008

Replies: 22

Views: 34K

Undergrad Why Can Some Electromagnetic Waves Pass Through Materials While Others Cannot?

Mar 19, 2008 · Replies 12 · Mar 24, 2008

Replies: 12

Views: 6K

Undergrad Charges on outer surface only for conductors or all charged bodies?

Mar 22, 2008 · Replies 7 · Mar 24, 2008

Replies: 7

Views: 6K

High School Coulomb's law universal or not?

Mar 22, 2008 · Replies 15 · Mar 23, 2008

Replies: 15

Views: 12K

High School Superconductor with no current?

Mar 23, 2008 · Replies 1 · Mar 23, 2008

Replies: 1

Views: 2K

Graduate Electromagnetism and Feynman diagrams

Mar 23, 2008 · Replies 1 · Mar 23, 2008

Replies: 1

Views: 3K

High School Why the Neutral Wire Causes No Electric Shock

Mar 13, 2008 · Replies 16 · Mar 22, 2008

Replies: 16

Views: 16K

Undergrad Capacitors,dielectrics and electrostatic forces

Mar 21, 2008 · Replies 2 · Mar 22, 2008

Replies: 2

Views: 4K

High School Photoelectric effect (questions)

Mar 21, 2008 · Replies 4 · Mar 21, 2008

Replies: 4

Views: 3K

Undergrad Magnetic field between two solenoids

Mar 21, 2008 · Replies 2 · Mar 21, 2008

Replies: 2

Views: 16K

High School Understanding Wavelength & Frequency: c vs. v

Mar 21, 2008 · Replies 7 · Mar 21, 2008

Replies: 7

Views: 6K

Undergrad 5.8Ghz phones, less harmful than 2.4Ghz?

Mar 19, 2008 · Replies 1 · Mar 20, 2008

Replies: 1

Views: 5K

High School How do conductors and insulators behave in an electric field?

Mar 15, 2008 · Replies 2 · Mar 19, 2008

Replies: 2

Views: 4K

Undergrad Understanding Electric Discharges in Gas Tubes: Experiments and Atomic Structure

Mar 15, 2008 · Replies 1 · Mar 19, 2008

Replies: 1

Views: 3K

Undergrad Magnetic Fields: I don't understand cylindrical current systems

Mar 18, 2008 · Replies 3 · Mar 19, 2008

Replies: 3

Views: 3K

Undergrad Why is my Faraday cage not working?

Mar 11, 2008 · Replies 19 · Mar 19, 2008

Replies: 19

Views: 13K

Undergrad Exploding Polarized Capacitors - Causes and Mechanisms

Mar 13, 2008 · Replies 2 · Mar 19, 2008

Replies: 2

Views: 3K

High School Help understanding theory of Charge distribution

Mar 17, 2008 · Replies 4 · Mar 19, 2008

Replies: 4

Views: 2K

High School A few questions about Resistance and DC Circuits

Mar 18, 2008 · Replies 4 · Mar 19, 2008

Replies: 4

Views: 3K

High School Why do we convert a galvanometer into voltmeter and ammeter?

Mar 16, 2008 · Replies 4 · Mar 18, 2008

Replies: 4

Views: 7K

Undergrad How Do Revolutions Per Second Impact Force in Eddy-Current Speedometers?

Mar 15, 2008 · Replies 2 · Mar 16, 2008

Replies: 2

Views: 5K

Undergrad Kinetic Energy -> Electrical Energy

Mar 14, 2008 · Replies 14 · Mar 15, 2008

Replies: 14

Views: 19K

High School Why Don't Metals Get Charged by Friction?

Mar 14, 2008 · Replies 4 · Mar 15, 2008

Replies: 4

Views: 8K

Undergrad Understanding the Difference Between B and E Fields

Mar 12, 2008 · Replies 4 · Mar 14, 2008

Replies: 4

Views: 2K

Undergrad What is the Visual Model for Voltage?

Nov 27, 2007 · Replies 18 · Mar 13, 2008

Replies: 18

Views: 8K

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