Electromagnetic Induction… · SHS3 Physics

Lesson notes

Learning Objectives

Indicator: 3.3.3.LI.3 - Describe the factors that affect induced emf and explain direction of induced current using mnemonics of the Fleming’s Right Hand Rule.

By the end of the lesson, learners can:

State the four factors that affect the magnitude of induced emf in a conductor moving through a magnetic field.
Explain, using the relationship emf = BLv, how each factor (magnetic flux density, length of conductor, velocity) influences the size of the induced emf.
State Fleming’s Right Hand Rule correctly from memory.
Apply Fleming’s Right Hand Rule using the “First finger = Field, thuMb = Motion, seCond finger = Current” mnemonic to determine the direction of induced current in a given scenario.
Use Fleming’s Right Hand Rule to solve at least three numerical or descriptive problems involving a conductor moving in a magnetic field.

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Curriculum details

Strand: Electric Field, Magnetic Field and Electronics (Strand 3)
Sub-strand: Electromagnetic Induction & Applications (3.3)
Content standard: 3.3.3.CS.1 - Demonstrate knowledge and understanding of electromagnetic induction. 3.3.3.LO.1 Use the concept of electromagnetic induction to explain how electricity can be generated.
Indicator: 3.3.3.LI.3 - Describe the factors that affect induced emf and explain direction of induced current using mnemonics of the Fleming's Right Hand Rule.
Suggested placement: Semester 2, Week 8 (Week 28 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: NaCCA curriculum document, p. 185

Exemplars (from the NaCCA curriculum)

Talk for learning: Describe the factors that affect the magnitude of induced emf. Using mnemonics, explain Fleming's Right Hand Rule
Foster an inclusive and supportive learning environment.
Assessment (3.3.3.AS.3). The document marks these depth-of-knowledge levels for this indicator: Level 1 Recall; Level 2 Skills of conceptual understanding; Level 3 Strategic reasoning.
Teaching and Learning Resources:
- Audio-visuals
- Projectors,
- YouTube
- Interactive virtual laboratory
- Practical
- Reference laboratory books. setup