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05 Electricity and Magnetism

Electricity & Magnetism. In this section, learners explore the diversity of phenomena related to the fundamental physical property of (electric) charge, which experiences forces when interacting with electric and magnetic fields. There is a close analogy between mass in a gravitational fields and charge in an electric field. Electromagnetic forces can cause the kinds of motion studied in the earlier mechanics topics, and the microscopic behaviour of individual charges is connected to macroscopic property of current in circuit systems. The principle of conservation of energy guides the analysis of circuits containing resistors and e.m.f. sources. In H2 Physics, the consideration of charge storage in capacitors deepens learners’ appreciation of applications in electronics. The mathematics of oscillations and waves prove useful here for describing alternating currents in the electrical grid. In H3 Physics, the laws of electromagnetism are recast in integral form, which emphasises their geometrical nature, and allows characterisation of more complex field patterns. Learners explore the rotational motion of electric and magnetic dipoles, as well as the modification of electromagnetic fields in dielectric and ferromagnetic media, which is crucial for technological applications. In electrical circuits, the analogy with mechanical oscillations is established when inductive components are added to resistive and capacitive components.

Big ideas1. Electrical charge is a property of matter. Electrons can be transferred from one place to another, but cannot be created or destroyed. 2. Electricity is one of the most common means by which we transfer energy; the electrical current (moving charges) brings us energy from power plants when there is a complete (closed) circuit from the power plants to our homes or to industries. 3. In a closed circuit, potential difference, current, and resistance are related; a change in any part of the circuit affects all other parts (almost) instantaneously. By using various electrical components in different arrangements, we are able to set up practical circuits to serve specific purposes. 4. Naturally occurring magnets, as well as man-made magnets, interact with other magnets or magnetic materials. A freely suspended magnet comes to rest pointing in the N-S direction due to its interaction with the Earth’s magnetic field. 5. Electricity and magnetism are related effects that have many applications in everyday life: moving charges (electric current) create magnetic fields; varying magnetic fields create electric fields (electromagnetic induction). 6. complex systems may also be better characterised by statistical averages (e.g. drift velocity, temperature) as these quantities may be more meaningful than the properties and behaviours of individual components (e.g. electron movement in a wire resulting in the current).

 

Topic SLS Module H1 H2 H3
14. Electric Fields Electric Field ✔️ ✔️  
  Capacitance   ✔️  
15. Currents Transmission of Electricity: Alternating Currents or Direct Currents?   ✔️  
  Alternating Current (Lesson 1/2)   ✔️  
  Rectification of Alternating Current (Lesson 2/2)   ✔️  
  Current and Charge ✔️ ✔️  
16. Circuits Power and Resistance in a Circuit ✔️ ✔️  
  Potential Divider Circuits   ✔️  
 

Components in a Circuit (Lesson 2/2)

\[H1/H2 Physics\]
 ✔️ ✔️  
  Resistors in series and parallel arrangements ✔️ ✔️  
  Potential Difference, Voltage and Internal Resistance ✔️ ✔️  
  Capacitors in Circuits   ✔️  
17. Electromagnetic Forces Magnetic Field Produced by Current-Carrying Conductors ✔️ ✔️  
  Investigating the force on a current carrying wire ✔️ ✔️  
  Force on a Moving Charge in a Magnetic Field ✔️ ✔️  
  Interactions between Magnetic Fields and Current-Carrying Conductors ✔️ ✔️  
18. Electromagnetic Induction The Effect of Electromagnetic Induction on a Magnet Falling Through a Copper Pipe   ✔️  
  Magnetic Flux   ✔️  

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Parent Category: 05 Electricity and Magnetism
Category: 07 Magnetism
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Category: 07 Magnetism
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DC motor 3D virtual lab

DC Motor 3D Virtual Lab makes the hidden mechanism of a two-pole motor visible: magnetic field, coil current, magnetic force, split-ring commutation, dead spots and back-EMF.

Students can change the supply EMF, magnetic field and commutator gap, reverse the polarity, swap the magnets, pause the motion and test force-direction predictions.

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Parent Category: 05 Electricity and Magnetism
Category: 08 Electromagnetic Forces or Electromagnetism
Hits: 1214

Claude Fable 5 homopolar motor 3D explorer

Homopolar Motor 3D Explorer is an alternate, orbitable model created using Claude Fable 5. It makes the magnet's closed field loops, the conventional current path and the tangential magnetic force visible around the classic battery–magnet–wire motor.

Students can reverse the current, flip the magnet, change current and field strength, pause the dynamics and compare the three-dimensional B–I–F relationship with the observed rotation.

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Parent Category: 05 Electricity and Magnetism
Category: 08 Electromagnetic Forces or Electromagnetism
Hits: 1195

Homopolar motor 3D lab showing current, magnetic field and force

Homopolar Motor 3D Lab makes the invisible physics of the simplest electric motor visible. Students can orbit a battery–magnet–wire model, trace the closed current path, inspect smooth magnetic-field loops and compare the local current, field and force vectors that produce rotation.

The activity is designed to connect the global picture of a magnet's field—from its north pole through space and back into its south pole—with the local radial field component that acts on the current-carrying conductor.

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Parent Category: 05 Electricity and Magnetism
Category: 08 Electromagnetic Forces or Electromagnetism
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Category: 08 Electromagnetic Forces or Electromagnetism
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Category: 08 Electromagnetic Forces or Electromagnetism
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Parent Category: 05 Electricity and Magnetism
Category: 09 Electromagnetic Induction
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Parent Category: 05 Electricity and Magnetism
Category: 09 Electromagnetic Induction
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Category: 09 Electromagnetic Induction
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Parent Category: 05 Electricity and Magnetism
Category: 09 Electromagnetic Induction
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Parent Category: 05 Electricity and Magnetism
Category: 10 Capacitors and Inductors
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Subcategories

01 Electric Field Article Count:  10

02 Static Electricity Article Count:  5

01 Electromagnetism Article Count:  5

03 AC Article Count:  5

04 Current Article Count:  2

05 Circuits Article Count:  15

06 Practical Electricity Article Count:  4

07 Magnetism Article Count:  13

09 Electromagnetic Induction Article Count:  10

10 Capacitors and Inductors Article Count:  1