Electricity and Magnetism · Chapter

Electricity and Magnetism

Build from charges and circuits to magnetic fields, electromagnets, and practical electrical systems.

Start chapter Next: Electromagnetic Induction

Learning Path

Checkpoint 1: Electric fields

Charges and Fields

Start with charge, electric field patterns, potential, and how charged objects interact.

Checkpoint 2: Circuits

Current, Voltage and Resistance

Use circuit models to compare current, potential difference, resistance, power, and energy transfer.

Checkpoint 3: AC circuits

Changing Currents

Inspect alternating current ideas, waveform behaviour, and how AC differs from steady DC circuits.

Checkpoint 4: Practical electricity

Safe and Useful Electricity

Connect circuit concepts to household wiring, electrical safety, power ratings, and practical decisions.

Checkpoint 5: Magnetism

Magnets and Fields

Model magnetic field patterns, attraction, repulsion, and magnetic effects near materials.

Checkpoint 6: Electromagnetism

Currents Make Magnetic Effects

Use motors, solenoids, and force-on-wire models to connect current, magnetic field, and motion.

Chapter Lens

How do charges, currents, fields, and magnets help us model electrical and magnetic systems?

Electric fields describe how charges influence the space around them.
Circuits require complete conducting paths; current, potential difference, resistance, and power are connected but distinct ideas.
Magnetic effects appear around magnets and currents, and electromagnets connect electricity with motion and force.

Misconception Watch

Current is not used up by components; energy is transferred while charge continues around a complete circuit.
Voltage and current are related but not the same quantity.
Magnetic field lines are a representation of direction and pattern, not physical strings in space.

Chapter Concept Checks

1. In a simple series circuit, what must be true for current to flow?

Answer: There must be a complete conducting path with an energy source.

Distractors to watch for: Only one side of the battery needs to be connected. / Current flows only if the wires are very long. / A bulb uses up all the current before it returns.

2. What does potential difference describe in a circuit model?

Answer: Energy transferred per unit charge between two points.

Distractors to watch for: The number of charges destroyed by a component. / The mass of each electron. / The speed of light in the wire.

3. What happens when current flows through a wire near a magnetic field?

Answer: The wire can experience a magnetic force.

Distractors to watch for: The wire must lose its charge permanently. / The magnetic field always disappears. / The current becomes gravitational force.

Starter Set

Begin with one strong interactive from each strand before browsing the full chapter.

Electric fields

Earth Field And Potential Model

Explore Earth Field And Potential Model as an interactive EJS simulation for electricity and magnetism.

Study Electric fields

Circuits

Metalic Conductor Model

Explore Metalic Conductor Model as an interactive EJS simulation for electricity and magnetism.

Study Circuits

AC circuits

Average Power Of Alternating Current Simulator

Explore Average Power Of Alternating Current Simulator as an interactive EJS simulation for electricity and magnetism.

Study AC circuits

Practical electricity

Solving Resistor Networks Using Math JS Or Numerics Or Function Matrix Invert(M)

Explore Solving Resistor Networks Using Math JS Or Numerics Or Function Matrix Invert(M) as an interactive EJS simulation for electricity and magnetism.

Study Practical electricity

Magnetism

2 Bar Magnets On A Level Surface For Primary School Science

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Study Magnetism

Electromagnetism

Coulomb Pendulum Model

Explore Coulomb Pendulum Model as an interactive EJS simulation for electricity and magnetism.

Study Electromagnetism

Adaptive Suggestion

If this chapter feels hard, study the first few interactives and use the concept checks until your streak improves. If it feels easy, jump to resources with videos or OSPSG links and explain the model evidence in your own words.

Back to chapter map

1. Earth Field And Potential Model

ejss_model_electricfieldwee

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EJS Open Source 2 Charge Model With Field Vector, Field Lines, Potential Visual thumbnail

2. EJS Open Source 2 Charge Model With Field Vector, Field Lines, Potential Visual

ejss_model_twopointcharges01

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Capacitor Connected To A Battery (Work In Progress) thumbnail

3. Capacitor Connected To A Battery (Work In Progress)

ejss_model_capacitorTry2

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Moving Charge Electromagnetic Wave Visualization thumbnail

4. Moving Charge Electromagnetic Wave Visualization

ejss_model_chargeMoving

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5. Charge Distribution Simulator

ejss_model_sharpellipsecharge

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Charged Particles +, And Boundary Walls Simulator thumbnail

6. Charged Particles +, And Boundary Walls Simulator

ejss_model_ParticlesAndWalls

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7. Electric Field Line Model

ejss_model_electricfield

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8. Electric Field What Is Wrong

ejss_model_CoulombForceWrong

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Electric Multipole Field What Is Wrong? thumbnail

9. Electric Multipole Field What Is Wrong?

ejss_model_DipoleTrajectoryWrong

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10. Electric Multipole Field What Is Wrong?

ejss_model_DipoleTrajectoryWrong602

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11. Jacob Simulation

05electricitynmagnetism_16staticelectricity / jacob

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12. Metalic Conductor Model

ejss_model_driftvelocity

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13. Metalic Conductor Model

webejs_model_Metalic_conductor_Model

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14. Potential Difference

ejss_model_PotentialDifferenceFrem

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15. Powering The Alarm Clock

ejss_model_poweringTheAlarmClock

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16. Working With An Ammeter

ejss_model_WorkingWithAnAmmeterFrem

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17. AC Or DC Appliance?

ejss_model_eletric05acdcgame

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18. AC Or DC Appliance?

ejss_model_eletric05symbolmatchgame

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19. Circuitry At Home

ejss_model_CircuitryAtHomeFrem

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20. Conductor Vs Insulator

ejss_model_conductor_vs_insulator

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Current In Series And Parallel Circuits thumbnail

21. Current In Series And Parallel Circuits

ejss_model_CurrentInASeriesAndParallelCircuitFrem

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Direct And Alternating Current Comparison Simulator thumbnail

22. Direct And Alternating Current Comparison Simulator

ejss_model_ohmslaw

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23. Simple Electric Circuit

ejss_model_eletric03cellswrong

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24. Types Of Circuits

ejss_model_TypesOfCircuitsFrem

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Understanding Parallel Circuits thumbnail

25. Understanding Parallel Circuits

ejss_model_UnderstandingParallelCircuitsFrem

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26. Understanding Series Circuits

ejss_model_UnderstandingSeriesCircuitsFrem

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27. Variable Resistor

ejss_model_VariableResistorFrem

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28. Voltage In A Circuit

ejss_model_VoltageInACircuitFrem

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Where To Connect The Voltmeter thumbnail

29. Where To Connect The Voltmeter

ejss_model_WhereToConnectTheVoltmeterFrem

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30. Average Power Of Alternating Current Simulator

ejss_model_sin2

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31. Half Wave Rectifier Circuit

ejss_model_rectifierc

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High Power Transmission Line Simulator thumbnail

32. High Power Transmission Line Simulator

ejss_model_highpowertransmissionline

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Spring Mass System Analogue RLCcircuit thumbnail

33. Spring Mass System Analogue RLCcircuit

ejss_model_springRLC

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3 D Transformer Simulator Complied By EJSS 5.33 thumbnail

34. 3 D Transformer Simulator Complied By EJSS 5.33

ejss_model_transformer

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Alternating Current Circuit With Resistors, Capacitor Or Diode thumbnail

35. Alternating Current Circuit With Resistors, Capacitor Or Diode

ejss_model_circuitacrrcd

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36. Solving Resistor Networks Using Math JS Or Numerics Or Function Matrix Invert(M)

ejss_model_PICUPsolvingsystemsoflinearequations_resistorfrem_completed

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Solving Systems Of Linear Equations: Resistor Networks thumbnail

37. Solving Systems Of Linear Equations: Resistor Networks

ejss_model_PICUPsolvingsystemsoflinearequations_solutionfrem_completed

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38. Foutan Board

ejss_model_foutanboard

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39. Logo-Image: Chargerc/Screen Shot 2018-04-05 At 5.25.49 PM (2).Png

ejss_model_chargerc

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Solving Systems Of Linear Equations thumbnail

40. Solving Systems Of Linear Equations

ejss_model_PICUPsolvingsystemsoflinearequations_resistorfrem_completed / PICUPsolvingsystemsoflinearequations / solving systems of linear equations

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41. Solving Systems Of Linear Equations

ejss_model_PICUPsolvingsystemsoflinearequations_solutionfrem_completed / PICUPsolvingsystemsoflinearequations / solving systems of linear equations

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42. Circuit Builder

05electricitynmagnetism_19practicalelectricity / 2023-06-30-circuitbuilder

Open Circuit Builder, an interactive HTML5 learning activity for electricity and magnetism.

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43. Circuit Builder

05electricitynmagnetism_19practicalelectricity / circuit-builder

Open Circuit Builder, an interactive HTML5 learning activity for electricity and magnetism.

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44. 1 Instructorguide

ejss_model_PICUPsolvingsystemsoflinearequations_resistorfrem_completed / PICUPsolvingsystemsoflinearequations / 1instructorguide

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45. 1 Instructorguide

ejss_model_PICUPsolvingsystemsoflinearequations_solutionfrem_completed / PICUPsolvingsystemsoflinearequations / 1instructorguide

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46. 2 Theory

ejss_model_PICUPsolvingsystemsoflinearequations_resistorfrem_completed / PICUPsolvingsystemsoflinearequations / 2theory

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47. 2 Theory

ejss_model_PICUPsolvingsystemsoflinearequations_solutionfrem_completed / PICUPsolvingsystemsoflinearequations / 2theory

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48. 3 Exercises

ejss_model_PICUPsolvingsystemsoflinearequations_resistorfrem_completed / PICUPsolvingsystemsoflinearequations / 3exercises

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49. 3 Exercises

ejss_model_PICUPsolvingsystemsoflinearequations_solutionfrem_completed / PICUPsolvingsystemsoflinearequations / 3exercises

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50. 5 Solutions

ejss_model_PICUPsolvingsystemsoflinearequations_resistorfrem_completed / PICUPsolvingsystemsoflinearequations / 5solutions

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51. 5 Solutions

ejss_model_PICUPsolvingsystemsoflinearequations_solutionfrem_completed / PICUPsolvingsystemsoflinearequations / 5solutions

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52. 2 Bar Magnets On A Level Surface For Primary School Science

ejss_model_TwoBarMagnetsOnALevelledSurface

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53. Hanging Magnet

ejss_model_hangingmagnet

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54. Stacking Ring Magnets

ejss_model_StackingMagnet8

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55. Suspended Magnet

ejss_model_SuspendedMagnet3

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56. Swinging Magnet

ejss_model_SwingingMagnet2

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Helmholtz Coil Simulator/ Charged Particle Trapped In Magnetic Mirror Field thumbnail

57. Helmholtz Coil Simulator/ Charged Particle Trapped In Magnetic Mirror Field

ejss_model_mirrorfieldwee

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3 D Visualization Of Magnetic Field From A Bar Magnet thumbnail

58. 3 D Visualization Of Magnetic Field From A Bar Magnet

ejss_model_fieldlines3Dwee

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Bar Magnet Field Line Simulator thumbnail

59. Bar Magnet Field Line Simulator

ejss_model_magnetbar

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Magnet On Car Inquiry Primary Science thumbnail

60. Magnet On Car Inquiry Primary Science

ejss_model_twomagnets4

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Magnetic Bar Fieldrotationwee Bar Magnet And Compass Model thumbnail

61. Magnetic Bar Fieldrotationwee Bar Magnet And Compass Model

ejss_model_MagneticBarFieldrotationwee

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Magnetic Bar Fieldsecondmagnet 06 EJS Open Source 2 Bar Magnets And Compass Model Java... thumbnail

62. Magnetic Bar Fieldsecondmagnet 06 EJS Open Source 2 Bar Magnets And Compass Model Java...

ejss_model_MagneticBarFieldsecondmagnet06

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Magnetic Dipole Field Vector And Field Lines Simulator thumbnail

63. Magnetic Dipole Field Vector And Field Lines Simulator

ejss_model_MagneticDipoleField3Dwee

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64. Magnetic Field Of 2 Wires

ejss_model_MagneticField2Wirewee

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65. Mini Magnetic Golf Game

ejss_model_MagneticMiniGolf

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EJS Open Source 2 Bar Magnets & Compass Model thumbnail

66. EJS Open Source 2 Bar Magnets & Compass Model

ejss_model_MagneticBarFieldrotationwee / MagneticBarField / TwoBarMagnetsandCompass

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67. EJS Open Source 2 Bar Magnets & Compass Model

ejss_model_MagneticBarFieldsecondmagnet06 / MagneticBarField / TwoBarMagnetsandCompass

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Magnetic Field Lines With Directional Arrows (Improved Spacing) thumbnail

68. Magnetic Field Lines With Directional Arrows (Improved Spacing)

05electricitynmagnetism_20magnetism / MagneticFieldLineswiththeRight-HandGripRule

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69. Coulomb Pendulum Model

ejss_model_CoulombPendulum

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70. Helmholtz Coil Simulator/ Charged Particle Trapped In Magnetic Mirror Field

ejss_model_mirrorfieldwee

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71. Bar Magnet And Wire Model

ejss_model_MagneticBarFieldanswirewee

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Changes Of A Electromagnet'S Polarity thumbnail

72. Changes Of A Electromagnet'S Polarity

ejss_model_Magnets

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73. Cyclotron Simulator

ejss_model_chargeinNScyclotronwee

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Direct Current Motor Simulator thumbnail

74. Direct Current Motor Simulator

ejss_model_DCmotor10wee1

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75. Lorentz Force On A Wire

ejss_model_LorentzForcewee01

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76. Magnetic Field Of 2 Wires

ejss_model_MagneticField2Wirewee4

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77. Mass Spectrometer

ejss_model_massspec_final_master

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Strength Of An Electro Magnet With Variables Number Of Coils, Material Of Rod Type, Iro... thumbnail

78. Strength Of An Electro Magnet With Variables Number Of Coils, Material Of Rod Type, Iro...

ejss_model_EMStrengthpaperclips

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79. Strength Of An Electro Magnet With Variables Number Of Coils, Material Of Rod Type, Iro...

ejss_model_EMStrengthpaperclips_numberofocoilandbattery

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80. EJS Open Source 2 Bar Magnets & Compass Model

ejss_model_MagneticBarFieldanswirewee / MagneticBarField / TwoBarMagnetsandCompass

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Wien (E X B) Filter Exercise 3, Not Working Yet Need Odeint To Work thumbnail

81. Wien (E X B) Filter Exercise 3, Not Working Yet Need Odeint To Work

ejss_model_PICUP_ExB_Filter_Exercise_3_frem

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