Electric & Magnetic Fields | Potential, Capacitors & the Lorentz Force | Physics Unit | Honors & AP

Electric & Magnetic Fields is a complete, no-prep physics unit for Grades 11–12 · Honors, AP & A Level: four double lessons (8 × 45 minutes) with teacher lesson plans, two reading passages, four print-ready worksheets, fully written answer keys, an assessment rubric and a 10-slide editable presentation — differentiated at three levels.

Guiding question: How do fields describe forces and energy transfers without immediate contact?

Electric field strength, potential, capacitance, magnetic flux density and the Lorentz force are organised through field and energy models. Measurement and calculation connect ideal homogeneous fields with real limitations.

What's Included

• Teaching rationale and competency framework
• Complete lesson plans with timings for 4 double lessons (8 × 45 min)
• 2 detailed student reading passages
• 4 print-ready student worksheets
• Fully written solutions and an assessment rubric
• 20-point assessment with answer key
• 3 levels of differentiation: Foundation · Core · Extension
• Formula sheet and board summary
• 10 editable presentation slides (PPTX)
• Print and digital · US Letter and A4

The Four Double Lessons

1. Fields assign properties to space
2. Potential links fields and energy
3. Capacitors store separated charge and energy
4. Magnetic fields deflect moving charges

Topics Covered

• The field concept and field lines
• Electric field strength and Coulomb's law
• Electric potential, potential difference and work
• Homogeneous fields and the parallel-plate arrangement
• Capacitance, charging and stored energy
• Magnetic flux density and the Lorentz force
• Charged particles in fields; velocity selector

Students Will Learn To

• use central quantities, concepts and laws accurately in scientific language
• formulate a testable question, control variables, analyse measurements and identify uncertainty
• present graphs, equations, models and experimental reports appropriately for the audience
• test physical claims, identify model limits and weigh technological or societal applications

Prerequisites & Equipment

Prior knowledge: charge, current and potential difference; forces and energy; vectors and proportionality

Equipment for the investigation: parallel-plate apparatus or field-mapping equipment, power supply, multimeter

Perfect For

• AP Physics 1 & 2 and AP Physics C support
• IB Physics SL/HL and A Level Physics
• Honors and enrichment courses
• Homeschool and independent study
• Sub plans and review weeks
• Lab-based inquiry units
• NGSS-aligned science classrooms

Why Teachers Choose This Unit

• Genuinely no-prep: open, print, teach
• Answer keys for every task, not just the hard ones
• Three differentiation levels built into the same lesson
• Hands-on investigation with realistic sample data included
• Editable slides you can adapt to your own sequence
• Model limits made explicit — students learn where physics stops, too

Created with AI assistance: ChatGPT (OpenAI) and Claude (Anthropic). All materials were reviewed and edited by a qualified teacher before publication.

Frequently Asked Questions

What grade levels is this unit for?

It is written for Grades 11–12 · Honors, AP & A Level. The Foundation / Core / Extension tasks let you use the same lesson across a mixed-ability class.

How long does the unit take?

Four double lessons, 8 × 45 minutes in total. Each double lesson can be split into two single periods.

Do I need laboratory equipment?

The core investigation uses: parallel-plate apparatus or field-mapping equipment, power supply, multimeter. Sample data and fully worked results are included, so the unit also works without equipment.

What file formats do I get?

Editable Word documents for the teaching unit and worksheets and an editable PowerPoint presentation, delivered as an instant digital download.