HIGH SCHOOL PHYSICS 1 COURSE. ( SPH 3U1/SPH 4A1)
updated: Aug 2006
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Unit 5: Electromagnetism
This unit looks at the combination of electricity and magnetism. It is amazing how much our technology depends on electromagnetism
- not just electricity or just magnetism. We will look at electromagnets, motors, generators, and transformers.
| Lesson |
Topic (no
lessons uploaded yet ...) |
Pages in Text |
Homework |
| 1. |
Magnetism, Domain Theory, Magnetic fields
Activity: field lines
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470-478 |
p476: Summarize the seven effects of the
domain theory
p478 #1,3,6 (top) |
| 2. |
Magnetic fields around conductors
Right Hand
Rule #1 = fields around conductors
Right hand rule #2 = field in coils
Solenoids |
479-485 |
p481#1-3, p482#1,2,4 p483#1,2, p488#4-7 p489#1-8 |
| 3. |
Quiz.
Electromagnets, Applications
Magnetic permeability, Magnetic field calculations
Activity:
make an electromagnet |
486-489 |
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| 4. |
How a DC Motor worksDC Motor ISP project |
496-499 |
p498 #1-4 |
| 5. |
Electromotive Force or Motor Principle
Right
Hand rule #3
Applications |
490-495 |
p 493#1,2
p504 #4-7, 9, 10 |
| 6. |
Electromagnetic induction, Faraday’s Law,
Lenz’s law (generators) |
506-512
513-517 |
p512#4,5 p517#1,2 (bottom) Read p518–522 p522#1-5 |
| 7. |
Transformers |
523-529 |
p 528 #1-4 (top or bottom?) |
| 8. |
Power transmission, eddy currents |
529-532 |
p 535 #1,2,6-8 |
| 9. |
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| 10. |
Review |
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| 11. |
UNIT
TEST |
| 12. |
D.C. Motor Testing -- before the last day
of classes (if this is the last unit) |
Extra Resources:
|
Sources:
Physics1: Electromagnetism Objectives (or Outcomes)
By the end of this unit the student will be able to:
define and describe the concepts and units related to magnetism and electromagnetism
(e.g. magnetic field, electromagnetic induction)
describe the properties of
magnetic fields
use compasses and iron filings
to locate and draw magnetic fields
describe, illustrate, and determine the direction of the magnetic field produced
by (a) a long straight conductor, (b) a solenoid
build an electromagnet, investigate
the factors that influence its strength
calculate the magnitude and direction of magnetic fields of a straight wire
and a solenoid
use superposition to determine the magnetic field
produced by two long wires
calculate the force of attraction of repulsion
between two long current-carrying wires
state the motor principle (electromotive
force) and what the requirements are for it to occur
use a right hand rule to determine
the direction of the electromotive force
state Faraday’s law of electromagnetic induction
state Lenz’s law and explain
the reasoning behind it
use Lenz’s law to determine
the direction of induced current
calculate the magnitude and direction of the
force experienced by a moving charged particle in a magnetic field (q, v, B)
and explain why the magnetic force can do no work
determine the direction and magnitude of the
force on a current carrying wire in a magnetic field
deduce the direction of the magnetic field from
the motion of a charged particle in that field
draw a diagram of a simple
transformer, labeling the parts
explain how a transformer works
use the transformer equations
for voltage and current to solve problems
explain why power transmission
is generally AC
compare direct current (DC)
and alternating current (AC) in qualitative terms, and explain the importance
of alternating current in the transmission of electrical energy;
identify the parts of a DC
motor and explain how it works
state 5 ways to make a motor
work better
build a model of one of these
devices that operates using the principles of electromagnetism (e.g. electric
bell, loudspeaker, ammeter, electric motor, electric generator).
explain how the devices above
work
"analyse and describe
the operation of industrial and domestic technological systems based on principles
related to magnetic fields (e.g., electric motors, electric generators, components
in home entertainment systems, computers, doorbells, telephones, credit cards)
"
"describe the historical
development of technologies related to magnetic fields (e.g., electric motors
and generators, cathode ray [TV] tubes, medical equipment, loudspeakers, magnetic
information storage). "
explain the principles
of domain theory of magnetism
use the domain theory
to explain observations about magnets
use power loss equation
to determine the power lost in transmission lines
explain the origin of
eddy currents, where they are useful, where they are detrimental to the operation
of electromagnetic devices, and how eddy currents can be minimized.
Legend:
Ministry of Education requirement
AP Physics requirement
Teacher's extra requirement
Last updated: May 2011