SHS2 Physics · Semester 2 Week 7: Electromagnetism

Lesson notes

Learning Objectives

Indicator: 2.3.2.LI.3 - Discuss Fleming’s left-hand rule.

By the end of the lesson, learners can:

State Fleming’s left-hand rule and identify the role of each finger (thumb, first finger, second finger) in determining the direction of motion, magnetic field, and current respectively.
Apply Fleming’s left-hand rule to predict the direction of force (motion) on a current-carrying conductor placed in a uniform magnetic field when given the directions of current and magnetic field.
Use a mnemonic to recall the ordering of the three quantities in Fleming’s left-hand rule (Force, Magnetic field, Current) with consistency.
Demonstrate the rule physically using their left hand to solve at least three different orientation problems correctly in pairs or small groups.
Justify, through discussion, why Fleming’s left-hand rule is used for motors while the right-hand rule is used for generators, connecting back to the motor effect studied in earlier lessons.

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Curriculum details

Strand: Electric Field, Magnetic Field and Electronics (Strand 3)
Sub-strand: Electromagnetism (3.2)
Content standard: 2.3.2.CS.1 - Demonstrate knowledge and understanding in analysing the factors that affect the magnetic force on conductors carrying current in a uniform magnetic field. 2.3.2.LO.1 Explain the how current is affected Personal and by the magnetic field using rules and Thinking calculations.
Indicator: 2.3.2.LI.3 - Discuss Fleming's left-hand rule.
Suggested placement: Semester 2, Week 7 (Week 27 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. 126

Exemplars (from the NaCCA curriculum)

Experiential Learning: Explain Flemings Left-Hand Rule reflecting inclusivity through games and mnemonics.
Ensure that the teaching materials, examples, and illustrations reflect diverse perspectives.
Assessment (2.3.2.AS.3). The document marks these depth-of-knowledge levels for this indicator: Level 1 Recall; Level 4 Extended critical thinking and reasoning.
Teaching and Learning Resources:
- Laptop/Computer
- Projector
- Internet
- Simulation lab software
- Flash cards
- Science kit set
- Magnets
- Iron filings