Mark Sailer
Science Teacher
Pioneer Jr-Sr High

Physics 1- Electromagnetism and Electromagnetic Induction Unit

Study Guidelines/What is to be accomplished?

Compare and contrast magnetic poles and electric charges.
Use iron filings to interpret the strength of a magnetic field at different points near a magnet.
Relate the motion of electrons within a material to the ability of the material to become a magnet.
Describe what happens to the magnetic domains of iron in the presence of a strong magnet.
Describe the magnetic field produced by a current-carrying wire.
Describe how a magnetic field exerts a force on a charged particle in the field.
Describe some practical applications of a magnetic field exerting a force on a current-carrying wire.
Describe how a galvanometer and a motor work.
Suggest possible causes for earth’s magnetic field.
Describe how voltage is induced in a coil of wire.
State and explain Faraday’s Law.
Describe how a generator works.
Compare and contrast motors and generators.
Describe how a transformer works.
Explain why transformers are used for transmission of electric power.
Relate the magnitude and direction of an induced electric field to the inducing magnetic field, and vice versa.
Describe electromagnetic waves.

State Standards and Benchmarks addressed by this unit

P.1.18 – Explain the concepts of electrical charge, electrical current, electrical potential electric field, and magnetic field. Use the definitions of the coulomb, the ampere, the volt, the volt/meter, and the tesla.

P.1.20 – Describe electric and magnetic forces in terms of the field concept and the relationship between moving charges and magnetic fields. Know that the magnitude of the force on a moving particle with charge q in a magnetic field is qvBsina, where v and B are the magnitudes of vectors v and B and a is the angle between v and B.

P.1.21 – Explain the operation of electric generators and motors in terms of Ampere’s Law and Faraday’s Law.

Activities – 70 points Maximum

Lab – In which direction do magnetic fields act? (5 points)
Concept Page 36-1 (5 points)
Concept Page 37-1 (5 points)
Concept Page 37-2 (5 points)
Lab 95 – Jump Rope Galvanometer (5 points)
Chapter 36 Review Questions #1-20 p. 575-576 (10 points)
Chapter 36 Questions #21-32 p. 576 (10 points)
Chapter 37 Review Questions #1-22 p. 592-593 (10 points)
Chapter 37 Questions #23-24, 25, 28, 29, 31, 35, 37, 38, 40 p. 593-594 (10 points)

B- Layer Experiment – Follow proper experiment and recording procedures. (10 points)

What is one variable that determines the strength of an electromagnet?

A-Layer Assignments – Use an A layer research form to record your research. (15 points)

1. Research superconducting magnets and write a one-page summary of proposed future uses for such magnets. Be sure to describe any hurdles that stand in the way of the practical application of these magnets.

2. Research phenomena related to one of the following topics, and prepare a report or presentation with pictures and data.

How does Earth’s magnetic field vary with latitude, with longitude, with the distance from Earth, and in time?
How do people who rely on compasses account for these differences in Earth’s magnetic field?
What is the Van Allen belt and why is it important?
How do solar flares occur and how do they affect Earth?

3. Research the debate between the proponents of alternating current and those who favored direct current in the 1880-1890s. How were Thomas Edison and George Westinghouse involved in the controversy? What advantages and disadvantages did each side claim? What uses of electricity were anticipated? What kind of current was finally generated in the Niagara Falls Hydroelectric plant? Had you been in a position to fund these projects at that time, which projects would you have funded? Prepare a report, presentation or re-enact a meeting of businesspeople in Buffalo in 1887.

Grades 55-64 D 65-74 C 75-84 B 85+ A

Activities Points Earned _________ B-Layer ___________A-Layer __________ TOTAL _______

To Earn an A on this unit you must complete a B project and an A project!!!!