Lesson Plan

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Lesson Plan
Grade: Date: 17/01/2026
Subject: Physics
Lesson Topic: understand and use the concept of magnetic flux linkage
Learning Objective/s:
  • Describe magnetic flux and flux linkage and write their mathematical forms.
  • Apply Faraday’s law to calculate the induced emf of a coil.
  • Analyse how changes in number of turns, magnetic field strength, coil area, and orientation affect flux linkage and emf.
  • Predict the direction of the induced current using Lenz’s law.
  • Solve quantitative problems involving rotating coils and time‑varying magnetic fields.
Materials Needed:
  • Projector or interactive whiteboard
  • Handout/ textbook section on electromagnetic induction
  • Worksheets with practice questions
  • Scientific calculators
  • Coil models or a computer simulation applet
  • Whiteboard and markers
 Introduction:
Begin with a short video of a generator in action to spark curiosity. Ask students to recall how a changing magnetic field produces an emf, linking to their prior work on Faraday’s law. Explain that by the end of the lesson they will be able to describe flux linkage and use it to predict induced voltages.
Lesson Structure:
  1. Do‑now (5') – quick quiz on magnetic field concepts and previous Faraday’s law.
  2. Mini‑lecture (10') – define magnetic flux, introduce flux linkage (Λ = N B A cosθ) with diagram.
  3. Demonstration (8') – rotating‑coil apparatus connected to an oscilloscope; discuss observed sinusoidal emf and Lenz’s law.
  4. Guided practice (12') – step‑by‑step solution of the worked example for maximum emf; students complete in pairs.
  5. Interactive simulation (10') – vary N, B, A, and θ; record how emf changes.
  6. Check for understanding (5') – exit ticket: calculate average emf for a coil with a linearly increasing magnetic field.
  7. Homework briefing (2') – assign the three practice questions from the source.
Conclusion:
Recap the key relationships between flux linkage, its rate of change, and induced emf, emphasizing Lenz’s law for direction. Collect the exit tickets to gauge mastery and remind students to complete the practice questions for reinforcement.