Understanding Electricity and Circuits: Basics, Components, and Applications

Course 5 –
Electricity
and Circuits
 
Objectives
Circuit symbols
Calculating electrical quantities
Measuring electrical quantities
Identifying circuits
Measuring circuits
Relevancy
To understand the basics of electricity
To promote an  engineering mindset
NABCEP PV Associate certification
CVQ level 2
Circuits
Energy source – to provide voltage
Conductors – to allow current to flow
Insulators – to confine current to desired path
Load – to convert electrical energy to desired energy
Control device – to start or stop the flow of current
Protection device – to protect circuit during a malfunction
Circuits
Provide an example of:
Energy Source
Conductors
Insulators
Circuits
Provide an example of:
Load
Control device
Protection device
Circuits
Based on the previous list:
which components are essential
Which components are not essential
Schematic Diagram
Cell
Wire
Switch
Lamp
Lamp Circuit
This Photo
 by Unknown Author is licensed under 
CC BY-NC-ND
Discussion
Should we have protection devices?
Are there benefits to having/using protection devices?
Electrical Symbols
(Wikibooks, 2005)
Electrical Quantities
Electrical Laws
 
(Rider, 2012)
Resistance in a wire
relationship
Ohm's law relationship
Calculating Electrical Quantities
If the circuit on the right is
powered by 1.5 volt cell and
has a current of 200
milliamp, what is the circuit
resistance?
This Photo
 by Unknown Author is licensed under 
CC BY-NC-ND
Calculating Electrical Quantities
This Photo
 by Unknown Author is licensed under 
CC BY-NC-ND
Calculating Electrical Quantities
An customer has a 8 watt LED light on for 24 hours of the
day.
How much energy did the light use?
Calculating Electrical Quantities
Calculating Electrical Quantities
Calculating Electrical Quantities
Calculating Electrical Quantities
An customer has a 8 watt LED light on for 24 hours of the
day.
How much did the customer pay the utility company?
Calculating Electrical Quantities
Calculating Electrical Quantities
Calculating Electrical Quantities
Measuring
Electrical Quantities
Voltage is measured in
parallel
Current is measured in series
Resistance is measured in
parallel with power off
A multimeter has the
capability to do multiple
functions
Measuring Electrical Quantities
Circuits
Series
Parallel
Series-Parallel
Series and Parallel Circuits
Series-Parallel
A combination of a series and
parallel circuit
This example is relatively
simple
This Photo
 by Unknown Author is licensed under 
CC BY
Series-Parallel
A combination of a series and
parallel circuit
This example is more difficult
How is it Connected?
This Photo
 by Unknown Author
is licensed under 
CC BY-SA
This Photo
 by Unknown Author
is licensed under 
CC BY-SA
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This educational course covers topics such as circuit symbols, calculating and measuring electrical quantities, identifying circuits, and understanding the relevance of electricity in engineering. It explains essential circuit components like energy sources, conductors, insulators, loads, control devices, and protection devices. The course also discusses schematic diagrams, electrical symbols, laws such as Ohm's law, and practical examples of circuits with components. Additionally, a discussion on the importance of protection devices in circuits is presented.


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  1. Course 5 Electricity and Circuits

  2. Objectives Circuit symbols Calculating electrical quantities Measuring electrical quantities Identifying circuits Measuring circuits

  3. Relevancy To understand the basics of electricity To promote an engineering mindset NABCEP PV Associate certification CVQ level 2

  4. Circuits Energy source to provide voltage Conductors to allow current to flow Insulators to confine current to desired path Load to convert electrical energy to desired energy Control device to start or stop the flow of current Protection device to protect circuit during a malfunction

  5. Circuits Provide an example of: Energy Source Conductors Insulators

  6. Circuits Provide an example of: Load Control device Protection device

  7. Circuits Based on the previous list: which components are essential Which components are not essential

  8. Schematic Diagram Cell Switch Wire Lamp

  9. Lamp Circuit This Photo by Unknown Author is licensed under CC BY-NC-ND

  10. Discussion Should we have protection devices? Are there benefits to having/using protection devices?

  11. Electrical Symbols (Wikibooks, 2005)

  12. Electrical Quantities ??????? (?) ?????????? (?) Ohm s law ??????? ? = Watt s law (power law) ????? ? = ??????? ? ??????? (?)

  13. Electrical Laws Resistance in a wire relationship Ohm's law relationship (Rider, 2012)

  14. Calculating Electrical Quantities If the circuit on the right is powered by 1.5 volt cell and has a current of 200 milliamp, what is the circuit resistance? This Photo by Unknown Author is licensed under CC BY-NC-ND

  15. Calculating Electrical Quantities If the circuit on the right is powered by 1.5 volt cell and has a current of 200 milliamp, what is the circuit resistance? ? =? ? ? =1.5 ????? 0.2 ???? ? = 7.5 This Photo by Unknown Author is licensed under CC BY-NC-ND

  16. Calculating Electrical Quantities An customer has a 8 watt LED light on for 24 hours of the day. How much energy did the light use?

  17. Calculating Electrical Quantities An customer has a 8 watt LED light on for 24 hours of the day. How much energy did the light use? ?????? = ????? ????

  18. Calculating Electrical Quantities An customer has a 8 watt LED light on for 24 hours of the day. How much energy did the light use? ?????? = ????? ???? ?????? = 8 ????? 24 ????

  19. Calculating Electrical Quantities An customer has a 8 watt LED light on for 24 hours of the day. How much energy did the light use? ?????? = ????? ???? ?????? = 8 ????? 24 ???? ?????? = 192 ???? ???? ?? 0.192 ??

  20. Calculating Electrical Quantities An customer has a 8 watt LED light on for 24 hours of the day. How much did the customer pay the utility company?

  21. Calculating Electrical Quantities An customer has a 8 watt LED light on for 24 hours of the day. How much did the customer pay the utility company? ???? = ?????? ????

  22. Calculating Electrical Quantities An customer has a 8 watt LED light on for 24 hours of the day. How much did the customer pay the utility company? ???? = ?????? ???? ???? = 0.192 ?? $0.33 ??

  23. Calculating Electrical Quantities An customer has a 8 watt LED light on for 24 hours of the day. How much did the customer pay the utility company? ???? = ?????? ???? ???? = 0.192 ?? $0.33 ?? ???? = $0.06336

  24. Measuring Electrical Quantities Voltage is measured in parallel Current is measured in series Resistance is measured in parallel with power off A multimeter has the capability to do multiple functions

  25. Measuring Electrical Quantities

  26. Circuits Series Parallel Series-Parallel

  27. Series and Parallel Circuits

  28. Series-Parallel A combination of a series and parallel circuit This example is relatively simple This Photo by Unknown Author is licensed under CC BY

  29. Series-Parallel A combination of a series and parallel circuit This example is more difficult

  30. How is it Connected? This Photo by Unknown Author is licensed under CC BY-SA This Photo by Unknown Author is licensed under CC BY-SA

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