Magnetostatics · SHS1 Physics

Lesson notes

Learning Objectives

Indicator: 1.3.2.LI.2 - Describe the magnetic field.

By the end of the lesson, learners can:

Define the magnetic field as the region around a magnet where magnetic force is experienced.
Draw the magnetic field lines around a bar magnet, including proper direction (from north to south outside the magnet) and relative spacing.
Identify points of strong and weak magnetic force around a bar magnet by interpreting the pattern of iron filings.
Explain the relationship between the geographic north and south poles and the magnetic north and south poles, based on the behaviour of a freely suspended magnet.
Describe magnetic field lines as closed loops that run from north to south outside the magnet and from south to north inside the magnet.

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Curriculum details

Strand: Electric Field, Magnetic Field and Electronics (Strand 3)
Sub-strand: Magnetostatics (3.2)
Content standard: 1.3.2.CS.1 - Demonstrate knowledge and understanding of the basics of magnets, magnetization and demagnetization and magnetic field. 1.3.2.LO.1 Use knowledge gained to distinguish between magnetic and non-magnetic materials and explain magnetization and demagnetization.
Indicator: 1.3.2.LI.2 - Describe the magnetic field.
Suggested placement: Semester 2, Week 9 (Week 29 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.
Source document note: The official curriculum document has a fault in this entry, so the curriculum text above is transcribed exactly as printed:

content standard text - p.66: the document prints this content standard code as 1.3.2.CS.2.1
indicator text - p.66: the document prints this learning indicator code as 1.3.2.LI.1.2
exemplars - p.66: the document prints this assessment code as 1.3.2.AS.1.2
Curriculum reference: NaCCA curriculum document, p. 66

Exemplars (from the NaCCA curriculum)

Experiential Learning:
- In random groups, learners suspend a bar magnet on a thread and retort stand and record their observations. Learners establish the relationship between the geographic north and south and the magnetic north and south based on the orientation of the freely suspended magnet.
- Draw and describe magnetic field lines of a magnet using a bar magnet, A4 sheet and iron filings. Indicate points around the magnet where the force is strong and weak.
Provide equitable access to resources and opportunities.
Assessment (1.3.2.AS.2). The document marks these depth-of-knowledge levels for this indicator: Level 2 Skills of conceptual understanding.
Teaching and Learning Resources:
- Magnetic
- Audio-visuals and non-magnetic materials
- Interactive
- Magnets simulations
- Iron filings
- Flash cards