Lesson Plan

• Describe Faraday’s law and the relationship between induced emf and the rate of change of magnetic flux.
• Identify the six key factors that influence the magnitude of an induced emf.
• Explain how each factor (turns, field strength, area, rate of change, motion, angle) affects the emf with real‑world examples.
• Apply the factor relationships to calculate the induced emf in typical coil and conductor problems.

• Projector or interactive whiteboard
• PowerPoint slides showing rotating coil and moving conductor diagrams
• Printed worksheet with summary table and practice problems
• Coil models or a PhET simulation of electromagnetic induction
• Magnets, copper wire, ruler for a quick classroom demonstration
• Calculators for students

Begin with a short video of a generator powering a light bulb to capture interest. Ask students what they think causes the light to turn on when the coil spins. Review Faraday’s law from the previous lesson and state that today they will discover what variables make the induced emf larger. Success will be measured by their ability to list and explain the six factors.

1. Do‑Now (5’): Quick quiz on magnetic flux concepts; collect responses.
2. Mini‑lecture (10’): Present Faraday’s law and introduce the six factors with visual slides.
3. Guided Exploration (12’): Use the coil simulation to vary one factor at a time (turns, B‑field, area, speed, angle) and observe emf changes.
4. Hands‑On Demo (8’): Demonstrate a rotating rectangular coil and a moving straight conductor; students record observations.
5. Practice Problems (10’): Students work in pairs on worksheet items, calculating emf for different scenarios.
6. Check for Understanding (5’): Whole‑class discussion of answers; teacher highlights common misconceptions.
7. Summary Review (5’): Re‑visit the summary table; students add one real‑world example for each factor.

Recap the six factors and how each quantitatively influences the induced emf. Have students write one “exit ticket” statement describing which factor would most increase emf in a given situation. Assign homework: complete the remaining worksheet problems and prepare a short explanation of how a bicycle dynamo works.