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PlayOwl

Science · Grade 11

Magnetism and Electromagnetic Models

Learners build the electromagnetic model step by step: magnetic fields of magnets and currents, the force on a current in a field and how it drives motors, electromagnetic induction and Lenz's law in generators, and transformers that make long-distance power transmission efficient. The course ends by connecting changing electric and magnetic fields to electromagnetic waves.

  • 4 lessons
  • About 125 minutes
  • Electromagnetism check: 10 questions
  • Ways to answer: choose an answer, draw a graph, match pairs, type a number, put in order and sort into groups
See plans Included with Family, Teacher and School plans. Open in PlayOwl

What learners will discover

  • Describe magnetic fields of magnets, straight wires and solenoids with field lines and the right-hand grip rule, and calculate the field inside a long solenoid.
  • Calculate the force on a current-carrying conductor with F = BIL sin θ and explain how a DC motor produces continuous rotation.
  • Explain and calculate induced emf using Faraday's law and emf = BLv, apply Lenz's law, and explain how a generator works.
  • Apply the transformer equations and P = I²R to explain why electricity is transmitted at high voltage.

Lessons

  1. Magnetic fields of magnets and currents 7 steps4 practiceabout 30 min
  2. The motor effect 6 steps4 practiceabout 30 min
  3. Electromagnetic induction 7 steps4 practiceabout 33 min
  4. Transformers and the grid 7 steps5 practiceabout 32 min
  5. Electromagnetism check 10 questions at the end

Keep exploring

More 11th grade science

Guide for grown-ups