Electricity Skill Trades 1201. Parts of An Atom Electrons are negatively charged particles that...
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![Page 1: Electricity Skill Trades 1201. Parts of An Atom Electrons are negatively charged particles that orbit around the nucleus. Protons are positively charged.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649e2b5503460f94b19066/html5/thumbnails/1.jpg)
Electricity
Skill Trades 1201
![Page 2: Electricity Skill Trades 1201. Parts of An Atom Electrons are negatively charged particles that orbit around the nucleus. Protons are positively charged.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649e2b5503460f94b19066/html5/thumbnails/2.jpg)
Parts of An Atom
![Page 3: Electricity Skill Trades 1201. Parts of An Atom Electrons are negatively charged particles that orbit around the nucleus. Protons are positively charged.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649e2b5503460f94b19066/html5/thumbnails/3.jpg)
Electrons are negatively charged particles that orbit around the nucleus.
Protons are positively charged.
![Page 4: Electricity Skill Trades 1201. Parts of An Atom Electrons are negatively charged particles that orbit around the nucleus. Protons are positively charged.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649e2b5503460f94b19066/html5/thumbnails/4.jpg)
Opposite charges attract.
Electricity occurs when electrons flow from one atom to another.
![Page 5: Electricity Skill Trades 1201. Parts of An Atom Electrons are negatively charged particles that orbit around the nucleus. Protons are positively charged.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649e2b5503460f94b19066/html5/thumbnails/5.jpg)
Voltage
Voltage is a measure of the Electromotive Force (EMF) in electricity.
EMF is the electric force that "pushes" electrons around a circuit.
![Page 6: Electricity Skill Trades 1201. Parts of An Atom Electrons are negatively charged particles that orbit around the nucleus. Protons are positively charged.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649e2b5503460f94b19066/html5/thumbnails/6.jpg)
Voltage
Measured in volts (v).
Algebraic Symbol: E or V
Graphic Symbol:
~_
+
![Page 7: Electricity Skill Trades 1201. Parts of An Atom Electrons are negatively charged particles that orbit around the nucleus. Protons are positively charged.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649e2b5503460f94b19066/html5/thumbnails/7.jpg)
Current
Current is a measure of the rate of electron flow through a material.
Measured in amps (a).
![Page 8: Electricity Skill Trades 1201. Parts of An Atom Electrons are negatively charged particles that orbit around the nucleus. Protons are positively charged.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649e2b5503460f94b19066/html5/thumbnails/8.jpg)
Current
Algebraic Symbol: I = intensity
Graphic Symbol:
A
![Page 9: Electricity Skill Trades 1201. Parts of An Atom Electrons are negatively charged particles that orbit around the nucleus. Protons are positively charged.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649e2b5503460f94b19066/html5/thumbnails/9.jpg)
Resistance Resistance is the property of matter
which opposes the flow of electrons.
Measured in ohms ().
![Page 10: Electricity Skill Trades 1201. Parts of An Atom Electrons are negatively charged particles that orbit around the nucleus. Protons are positively charged.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649e2b5503460f94b19066/html5/thumbnails/10.jpg)
Resistance Algebraic Symbol: R
Graphic Symbol:
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Conductors
Conductors have a large number of loosely attached electrons that can move very easily from one atom to another.
Examples:GoldCopperAluminumWater
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Insulators
Material with a high resistance to electrical current.
Electron orbits are very close to the nucleus. Examples:
Plastic Rubber Glass Wood
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Electrical Circuit
For electricity to flow, there must be a complete path. Therefore it must have: Conductor (e.g. Copper wire) Energy Source (e.g. Battery) Load (e.g. Light) Control Device (e.g. Switch)
![Page 14: Electricity Skill Trades 1201. Parts of An Atom Electrons are negatively charged particles that orbit around the nucleus. Protons are positively charged.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649e2b5503460f94b19066/html5/thumbnails/14.jpg)
Electrical Circuit
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Ohm’s Law
Ohms Law is a mathematical equation explaining the relationship between Voltage, Current, and Resistance.
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Ohm’s Law
The relationship is expressed asE = I * R
WhereE is Electromotive Force measured in Volts I is Electrical Current measured in AmperesR is Electrical Resistance measured in Ohms
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Ohm’s Law
E
I R
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Calculation
Using Ohm's Law equation, calculate Resistance, where:E = 120 volts, I = 15 amps
Answer:R = E/IR = 120 v / 15aR = 8
![Page 19: Electricity Skill Trades 1201. Parts of An Atom Electrons are negatively charged particles that orbit around the nucleus. Protons are positively charged.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649e2b5503460f94b19066/html5/thumbnails/19.jpg)
Power
Power is the ability of electricity to perform work.
Measured in watts (W) Algebraic Symbol: P
![Page 20: Electricity Skill Trades 1201. Parts of An Atom Electrons are negatively charged particles that orbit around the nucleus. Protons are positively charged.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649e2b5503460f94b19066/html5/thumbnails/20.jpg)
Power Law
The relationship is expressed as:P = I x E
Where…P is Power measured in Watts. I is Electrical Current measured in Amperes.E is Electromotive Force measured in Volts.
![Page 21: Electricity Skill Trades 1201. Parts of An Atom Electrons are negatively charged particles that orbit around the nucleus. Protons are positively charged.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649e2b5503460f94b19066/html5/thumbnails/21.jpg)
Power Law
P
I E
![Page 22: Electricity Skill Trades 1201. Parts of An Atom Electrons are negatively charged particles that orbit around the nucleus. Protons are positively charged.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649e2b5503460f94b19066/html5/thumbnails/22.jpg)
Calculation
Using Power equation, calculate Current (I), where:E = 120 volts and P = 800 w
Answer: I = P/E I = 800 w / 120 v I = 6.67 amps
![Page 23: Electricity Skill Trades 1201. Parts of An Atom Electrons are negatively charged particles that orbit around the nucleus. Protons are positively charged.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649e2b5503460f94b19066/html5/thumbnails/23.jpg)
Types of Circuits
SeriesA single path for current to flow.
ParallelA single voltage shared by multiple loads.
ComplexCombinations of series and parallel circuits.
![Page 24: Electricity Skill Trades 1201. Parts of An Atom Electrons are negatively charged particles that orbit around the nucleus. Protons are positively charged.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649e2b5503460f94b19066/html5/thumbnails/24.jpg)
Series Circuit
_
+
R1
R2
R3
EI
![Page 25: Electricity Skill Trades 1201. Parts of An Atom Electrons are negatively charged particles that orbit around the nucleus. Protons are positively charged.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649e2b5503460f94b19066/html5/thumbnails/25.jpg)
Simple Parallel Circuit
_
+R1 R2E
I
I1 I2
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Electrical Tools
Wire Strippers/Crimpers Insulated Screwdrivers
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Electrical Tools
Wire sheathing stripper Marrettes / Wire Nuts
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Electrical Tools
Lineman Pliers Needle Nose Pliers
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Electrical Tools
Octagon / Junction Box Switch Box
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Electrical Tools
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Electricity
Skill Trades 1201