ELEC 212 CLO 1 Study Guide
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San Joaquin Valley College, Temecula *
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Course
ELECTRICAL
Subject
Electrical Engineering
Date
Apr 3, 2024
Type
docx
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4
Uploaded by JusticeFreedomCamel6839
San Joaquin Valley College
ELEC 212 CLO 1 Study Guide Overview
Researching the answers to the questions below will help you prepare for the CLO 1 Assessment [Mastery] exam. Answers to all the questions can be found in the materials provided to you for this course.
Questions
1.
To which of Earth’s poles does this north pole of a compass point?
The north pole in a compass points north because this is where Earth’s south magnetic pole is located
2.
Lodestone is the name of a naturally occurring magnetic material. By what name is it also known?
Magnetite
3.
What type of magnets do not require any power or force to maintain their field?
Permanent magnets do not require any power or force to maintain their field
4.
Which maintain their magnetism longer, man-made permanent magnets or natural magnets?
Man-made Permanent magnets are materials that retain their magnetism long after being exposed to a magnetic field
5.
What are the three elements that form natural magnets?
Iron, Cobalt, and Nickel
6.
What are the magnetic lines of force called?
CLO 1 Study Guide
ELEC 212
Revised: 12.20 jh
Academic Affairs Department
San Joaquin Valley College
ELEC 212 CLO 1 Study Guide Flux
7.
What happens when two unlike magnetic poles get near each other?
When two magnets having opposite poles (one north pole and one
south pole) are placed close to each other, they get attracted
.
8.
What type of magnet depends on flowing current to produce a magnetic field?
Electromagnetic
9.
Describe the relationship between the number of turns of a conductor coil and the strength of an electromagnet.
We can say that; the strength of the electromagnet is directly proportional to the number of turns in the coil. If you double the number of turns, you double the strength of the electromagnet
10.
What is the word used to measure a material’s ability to be magnetized?
Permability
11.
Describe what the left-hand rule
has to do with an electromagnet’s polarity.
The left-hand rule is used to determine the polarity of an electromagnet. If the coil is grasped in the left hand in such a manner that the fingers curve around the coil in the direction of electron flow (minus to plus), the thumb points in the direction of
the north pole
CLO 1 Study Guide
ELEC 212
Revised: 12.20 jh
Academic Affairs Department
San Joaquin Valley College
ELEC 212 CLO 1 Study Guide 12.
Of the three basic classifications of magnetic materials, which materials are metals that are most easily magnetized?
Ferromagnetic metals that are easily magnetized such as iron, nickel, cobalt and manganese.
13.
What three factors determine the amount of voltage induced into a conductor?
a conductor, a magnetic field, and relative motion between the conductor and the field.
14.
What does the measurement Weber (Wb) represent?
the unit of magnetic flux 100,000,000
15.
Describe what causes one volt to be induced into a conductor.
When a conductor cuts magnetic lines of force, a voltage is induced into the weber conductor
16.
Describe Lenz’ law.
Lenz’s law, in electromagnetism, statement that an induced electric current flows in a direction such that the current opposes
the change that induced it
CLO 1 Study Guide
ELEC 212
Revised: 12.20 jh
Academic Affairs Department
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ELEC 212 CLO 1 Study Guide 17.
If a voltage is induced into a conductor by electromagnetic induction, what effect will reversing the direction of motion of the conductor have?
Reverse the polarity of the induced voltage.
18.
What is the unit of measurement for inductance?
The henry (symbol: H)
19.
Describe the inductance formula.
Magnetic Flux divided by current = Inductance
20.
Describe the R-L time constant.
Time necessary for current to reach full Ohm law value.
Submission
Submit this completed study guide to the appropriate dropbox.
CLO 1 Study Guide
ELEC 212
Revised: 12.20 jh
Academic Affairs Department
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1kQ
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