SHS2 Physics · Semester 2 Week 10: Electromagnetism

Lesson notes

Learning Objectives

Indicator: 2.3.2.LI.1 - Calculate force on a charged particle in a magnetic field.

By the end of the lesson, learners can:

State the factors that affect the magnetic force on a charged particle moving in a magnetic field: the magnitude of the charge (q), the velocity of the particle (v), the magnetic field strength (B), and the angle (φ) between the velocity and the field direction.
Apply the formula F = Bvq sin φ to calculate the magnetic force on a charged particle when given values for B, q, v, and φ.
Solve for any single unknown quantity (B, q, v, or φ) in the equation F = Bvq sin φ when the other three values are provided.
Describe qualitatively how the direction of the magnetic force depends on the direction of the particle’s motion and the sign of the charge, using the right-hand rule to determine the direction of the force on a positive charge.
Recognise that no magnetic force acts on a charged particle moving parallel or anti-parallel to the magnetic field (φ = 0° or 180°, so sin φ = 0), and that maximum force occurs when the particle moves perpendicular to the field (φ = 90°, so sin φ = 1).

Sign in with your phone number to read the full note and download the GES plan - free.

Sign in with phone number

Curriculum details

Strand: Electric Field, Magnetic Field and Electronics (Strand 3)
Sub-strand: Electromagnetism (3.2)
Content standard: 2.3.2.CS.3 - Demonstrate knowledge and understanding of the force exerted on a charged particle moving in electric and magnetic fields, and their applications 2.3.2.LO.3 Demonstrate knowledge of the relationship between the magnetic field and the electric field.
Indicator: 2.3.2.LI.1 - Calculate force on a charged particle in a magnetic field.
Suggested placement: Semester 2, Week 10 (Week 30 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. 130

Exemplars (from the NaCCA curriculum)

Experiential Learning: Using video simulations explain the main factors that affect charged particles moving in the magnetic field i.e., direction of the field, direction of the particle and charge of the particle.
Experiential Learning: Using video simulations explain the main factors that affect charged particles moving in a magnetic field as well as a crossed field charge of the particle. F = Bvq sin φ E = Bv
Foster an inclusive and supportive learning environment.
Assessment (2.3.2.AS.1). The document marks these depth-of-knowledge levels for this indicator: Level 3 Strategic reasoning.
Teaching and Learning Resources:
- Laptop/ Computer
- Projector
- Internet
- Simulation lab software
- Science kit set