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 EDU4PTM Detailed Lesson Plans LESSON PLAN– Week 01_Lesson 01 of 12 Name:MukeshSoni
Topic:Simplemagnetism,
Magneticfields
LessonNo:
Week01_Lesson01/12
Subject:Physics(Unit4)
School:
Duration:50minutes
Date:October2014
YearLevel:12
VCEAreaofStudy
LessonOutcomes:
Unit 4 – Area of study 1, Electric Power (VCAA,2010)
UnitOutcomes
By the completion of this lesson, students will be able to: 1. Magnets, their nature and brief history. 2. Earth’s magnetic field, declination and dip. Outcome 1 – Investigate and 3. Magnetic fields, their sign conventions. explain the operation of 4. Strength of the magnetic fields (magnetic force). electric motors, generators and alternators, and the generation, transmission, distribution and use of electric power. (VCAA,2010) Rationale:
Natural magnets derived from magnetite were discovered by Greeks in ~600 BC. They were then widely used in navigation due to their property to orient themselves to the north and south poles. Having found their wide use in navigation; magnets generated a great amount of curiosity to explore its properties, which led us to understand the earth’s magnetic field and the manner it protects us from the charged particles present in the universe. In 1820 Hans Christian Oersted discovered the golden connection between magnetism and electricity that an electric current could produce a magnetic field. Discoveries in electricity and magnetism (electromagnetism) has led us to truly remarkable achievements. This lesson incorporates the part of outcome 1 defined in the VCE Unit 4, Area of study 1. (VCAA, 2010)
Assessment:
Assess students’ subject knowledge, skills, and professional development during the session by raising questions related to fundamental concepts of the topic. Students to complete questions (9.1) in their text book. (Page 331 ‐ 332)
Mukesh Soni (Student ID: 18052187) Page 8 of 45 Time
05 mins 05 mins 05 mins EDU4PTM Procedure
Teacher
Student
Engagement: Inform to the students that today we shall start the area of study 1 ‘electric power’ in VCE unit 4. Since there is a strong connection between electricity and magnetism, the magnetism will be discussed first, then combined electromagnetism to finally study the generation of electrical power and its applications in modern society. Students will follow the teacher instructions to get engaged. Hook: Explore students’ prior knowledge about magnetism and its connection to earth’s magnetic field, usefulness of magnetism in practical world and its contribution in today’s modern society. The students will become attentive to raised questions. While listening to answers from students, probe to Some students will enrich their knowledge in the subject matter to meets start taking notes. the area of study 1 outcomes. Simple magnetism:  Iron is attracted to the magnets. Students will take notes.  Like magnetic poles repel each other, and unlike magnetic poles attract each other. 
Suspended magnets always align in an N ‐ S direction. 
Magnets are dipolar, the poles cannot be separated. Mukesh Soni (Student ID: 18052187) Page 9 of 45 EDU4PTM Magnetic fields: 10 mins Play the video file: “Bar Magnet ‐ Magnetic Field Demonstrator” The magnetic field formation around a bar magnet can be represented similar to the following diagram. Students will watch the video demonstration of magnetic field formations around bar magnet. Sign conventions: The magnetic field originates from NORTH pole and enters back into the SOUTH pole. Fields between two magnets: Earth as a big spherical magnet: take will take will 05 mins Students notes. Since the opposite poles attract each other and the similar poles repel each other, the formed magnetic field between two magnets can be presented as: A magnet’s NORTH pole was named on believing that it Students pointed to the geographic north pole of the earth. notes. If Earth is a big spherical magnet, the small magnet’s NORTH pole is attracted and aligned to the SOUTH pole of big spherical ‘earth’ magnet. Play the video file: “Bar Magnet – Modelling Earth's magnetic field” Mukesh Soni (Student ID: 18052187) Page 10 of 45 EDU4PTM The video demonstration of 3‐D spherical magnetic field Students will watch the formation around bar magnet will reflect the earth’s video demonstration of 3‐D spherical magnetic magnetic field presented in the following diagram. field formations around bar magnet reflecting earth’s magnetic field. 05 mins The axis of earth’s rotation (geometric poles) is different in comparison to the axis of earth’s magnetic poles. Therefore, Declination and Dip are necessary parameters for accurate navigation. Strength of magnetic fields (The magnetic force): Magnetic force is a vector quantity represented by symbol ‘B’. Students notes. will take Since the magnetic field originates from North pole, in a magnetic field presented above, the magnet’s North will experience repulsion and the south pole will experience attraction forming a torque. If the magnet is allowed to swing free at its axis, the magnet will align itself along the direction of the magnetic field facing North. Questions 9.1 on pages 331 – 332: For next fifteen minutes students will complete review Mukesh Soni (Student ID: 18052187) Page 11 of 45 EDU4PTM 15 mins questions from ‘9.1 ‐ fundamentals of magnetism’.
Assist in their queries related to concepts only. Conclusion: Finally at the end of the lesson, summarize the teaching delivered by self – evaluation and from the students if they were comfortable with the pace of the lesson and Self‐evaluation/ reflection at the end of that the learning outcomes were achieved.
the lesson.
Students to complete questions (9.1) in their text book. (Page 331 ‐ 332) Mukesh Soni (Student ID: 18052187) Page 12 of 45