SlideShare uma empresa Scribd logo
1 de 26
Baixar para ler offline
Basic Information of Ohm's law
Ohm's law magic triangle
Ohms law,
defines the relationship between voltage, current and resistance.
These basic electrical units apply to direct current, or alternating
current.
Ohm’s Law is the foundation of electronics and electricity.
This formula is used extensively by electricians.
Without a thorough understanding of “Ohm’s Law” an electrician
can not design or troubleshoot even the simplest of electronic or
electrical circuits.
Ohm established in the late 1820’s that if a voltage was applied to
a resistance then “current would flow and then power would be
consumed”.
Voltage measured in volts, symbolized by
the letters "E" or "V".
Current measured in amps, symbolized by
the letter "I".
Resistance measured in ohms, symbolized
by the letter "R".
Basic Information of Ohm's law
If you know E and I, and wish to determine R, just eliminate R from
the picture and see what's left:
If you know E and R, and wish to determine I, eliminate I and see
what's left:
if you know I and R, and wish to determine E, eliminate E and see
what's left:
Let's see how these equations might work to help us analyze
simple circuits:
If we know the values of any two of the three
quantities (voltage, current, and resistance) in
this circuit, we can use Ohm's Law to determine
the third.
calculate the amount of current (I) in a circuit, given values of voltage
(E) and resistance (R):
calculate the amount of resistance (R) in a circuit, given values of
voltage (E) and current (I):
calculate the amount of voltage supplied by a battery, given values of
current (I) and resistance (R):
Ohm’s Law power consumption
through a resistance
Some practical every day examples of this basic rule are:
base board heaters, electric frying pans, toasters
and electric light bulbs. The heater consumes power
producing heat for warmth, the frying pan consumes
power producing heat for general cooking, the toaster
consumes power producing heat for cooking toast,
and the electric light bulb consumes power producing heat
and more important light. A further example is
an electric hot water system. All are examples of Ohm’s Law.
Basic Information of Ohm's law
Basic Information of Ohm's law
Basic Information of Ohm's law
Basic Information of Ohm's law
Basic Information of Ohm's law
The force
or
pressure
behind
electricity
Basic Information of Ohm's law
Basic Information of Ohm's law
Basic Information of Ohm's law
Basic Information of Ohm's law
milliamp or just mA
As a milliampere (milliamp or just mA) is
1/1000th of an ampere, we can convert mA to Amps
by just dividing by 1000. Another way is to take
the current in mA and move the decimal to the
left three places to accomplish the division by
1000. Here's the scoop:
275 mA / 1000 = 0.275 Amps
Note that the decimal in 275 is to the right of
the 5, and it's written as 275.0 (with a 0 added
to show where the decimal is). Moving the decimal
to the left three places gets up to .275 Amps,
but we usually hang a 0 in front of the decimal.
To convert Amps to milliAmps, just multiply by
1000 or move the decimal to the right three
places. Just the opposite of what we did here to
convert the other way.
Basic Information of Ohm's law

Mais conteúdo relacionado

Mais procurados (20)

Resistor and its types
Resistor and its typesResistor and its types
Resistor and its types
 
Resistors - Basics
Resistors - BasicsResistors - Basics
Resistors - Basics
 
type of ohmmeter
type of ohmmetertype of ohmmeter
type of ohmmeter
 
Electricity and ohm’s law
Electricity and ohm’s lawElectricity and ohm’s law
Electricity and ohm’s law
 
Electric Circuits
Electric CircuitsElectric Circuits
Electric Circuits
 
Ohm's Law
Ohm's Law Ohm's Law
Ohm's Law
 
Ohmmeter
OhmmeterOhmmeter
Ohmmeter
 
Multimeter basics
Multimeter   basicsMultimeter   basics
Multimeter basics
 
Electricity ppt
Electricity  pptElectricity  ppt
Electricity ppt
 
current, voltage and resistance
current, voltage and resistancecurrent, voltage and resistance
current, voltage and resistance
 
Electric current and Voltage
Electric current and VoltageElectric current and Voltage
Electric current and Voltage
 
Basic Electricity
Basic ElectricityBasic Electricity
Basic Electricity
 
Ohms Law
Ohms LawOhms Law
Ohms Law
 
Digital multimeter
Digital multimeterDigital multimeter
Digital multimeter
 
Introduction of Current Electricity | Physics
Introduction of Current Electricity | PhysicsIntroduction of Current Electricity | Physics
Introduction of Current Electricity | Physics
 
Current, Voltage, & Resistance
Current, Voltage, & ResistanceCurrent, Voltage, & Resistance
Current, Voltage, & Resistance
 
How to use a digital multimeter
How to use a digital multimeterHow to use a digital multimeter
How to use a digital multimeter
 
Current & Ohms Law 03 2000
Current & Ohms Law 03 2000Current & Ohms Law 03 2000
Current & Ohms Law 03 2000
 
Analog and Digital Multimeters
Analog and Digital MultimetersAnalog and Digital Multimeters
Analog and Digital Multimeters
 
Basics Of Electricity
Basics Of ElectricityBasics Of Electricity
Basics Of Electricity
 

Semelhante a Basic Information of Ohm's law

Fairylights...Principles and Definition of Ohms Law
Fairylights...Principles and Definition of Ohms LawFairylights...Principles and Definition of Ohms Law
Fairylights...Principles and Definition of Ohms LawMuhammad Hammad Lateef
 
Investigación de la ley de ohm
Investigación de la ley de ohm Investigación de la ley de ohm
Investigación de la ley de ohm YazmanyRodriguez1
 
Unit c electrical principals & technologies notes(ohms law)
Unit c electrical principals & technologies notes(ohms law)Unit c electrical principals & technologies notes(ohms law)
Unit c electrical principals & technologies notes(ohms law)RileyAntler
 
basicofelectrical-150117065543-conversion-gate02.pdf
basicofelectrical-150117065543-conversion-gate02.pdfbasicofelectrical-150117065543-conversion-gate02.pdf
basicofelectrical-150117065543-conversion-gate02.pdfAbinaya Saraswathy T
 
ABE Review Class July 2022.pptx
ABE Review Class July 2022.pptxABE Review Class July 2022.pptx
ABE Review Class July 2022.pptxmechanics020377
 
Laboratory Manual - Ohm's Law
Laboratory Manual - Ohm's LawLaboratory Manual - Ohm's Law
Laboratory Manual - Ohm's LawIsuru Premaratne
 
The Applications and Limitations of Ohm.pdf
The Applications and Limitations of Ohm.pdfThe Applications and Limitations of Ohm.pdf
The Applications and Limitations of Ohm.pdfChloe Cheney
 
Presentation of Jelo Luceno (Fundamentals of Electricity and Electronics)
Presentation of Jelo Luceno (Fundamentals of Electricity and Electronics)Presentation of Jelo Luceno (Fundamentals of Electricity and Electronics)
Presentation of Jelo Luceno (Fundamentals of Electricity and Electronics)GlaizaBuyco
 
Ohms law by engineering mindset
Ohms law by engineering mindsetOhms law by engineering mindset
Ohms law by engineering mindsetKemChitterman
 
How-Current-Voltage-and-Resistance-Relate.pptx
How-Current-Voltage-and-Resistance-Relate.pptxHow-Current-Voltage-and-Resistance-Relate.pptx
How-Current-Voltage-and-Resistance-Relate.pptxChristianCatacutan2
 
Electrical Basic Measurement by Fildia Putri
Electrical Basic Measurement by Fildia PutriElectrical Basic Measurement by Fildia Putri
Electrical Basic Measurement by Fildia PutriIndy Puteri
 

Semelhante a Basic Information of Ohm's law (20)

Ohms law lesson 3
Ohms law lesson 3Ohms law lesson 3
Ohms law lesson 3
 
Fairylights...Principles and Definition of Ohms Law
Fairylights...Principles and Definition of Ohms LawFairylights...Principles and Definition of Ohms Law
Fairylights...Principles and Definition of Ohms Law
 
Investigación de la ley de ohm
Investigación de la ley de ohm Investigación de la ley de ohm
Investigación de la ley de ohm
 
MODULE 1.ppt
MODULE 1.pptMODULE 1.ppt
MODULE 1.ppt
 
Unit c electrical principals & technologies notes(ohms law)
Unit c electrical principals & technologies notes(ohms law)Unit c electrical principals & technologies notes(ohms law)
Unit c electrical principals & technologies notes(ohms law)
 
basicofelectrical-150117065543-conversion-gate02.pdf
basicofelectrical-150117065543-conversion-gate02.pdfbasicofelectrical-150117065543-conversion-gate02.pdf
basicofelectrical-150117065543-conversion-gate02.pdf
 
Basic of electrical
Basic of electricalBasic of electrical
Basic of electrical
 
ABE Review Class July 2022.pptx
ABE Review Class July 2022.pptxABE Review Class July 2022.pptx
ABE Review Class July 2022.pptx
 
eim.pptx
eim.pptxeim.pptx
eim.pptx
 
3 ohm's law
3 ohm's law3 ohm's law
3 ohm's law
 
Laboratory Manual - Ohm's Law
Laboratory Manual - Ohm's LawLaboratory Manual - Ohm's Law
Laboratory Manual - Ohm's Law
 
9 OHMS LAW POWER LAW.pptx
9 OHMS LAW  POWER LAW.pptx9 OHMS LAW  POWER LAW.pptx
9 OHMS LAW POWER LAW.pptx
 
The Applications and Limitations of Ohm.pdf
The Applications and Limitations of Ohm.pdfThe Applications and Limitations of Ohm.pdf
The Applications and Limitations of Ohm.pdf
 
ResistorS
ResistorSResistorS
ResistorS
 
Presentation of Jelo Luceno (Fundamentals of Electricity and Electronics)
Presentation of Jelo Luceno (Fundamentals of Electricity and Electronics)Presentation of Jelo Luceno (Fundamentals of Electricity and Electronics)
Presentation of Jelo Luceno (Fundamentals of Electricity and Electronics)
 
Ohms law by engineering mindset
Ohms law by engineering mindsetOhms law by engineering mindset
Ohms law by engineering mindset
 
How-Current-Voltage-and-Resistance-Relate.pptx
How-Current-Voltage-and-Resistance-Relate.pptxHow-Current-Voltage-and-Resistance-Relate.pptx
How-Current-Voltage-and-Resistance-Relate.pptx
 
power in oil rig.pdf
power in oil rig.pdfpower in oil rig.pdf
power in oil rig.pdf
 
Electrical Basic Measurement by Fildia Putri
Electrical Basic Measurement by Fildia PutriElectrical Basic Measurement by Fildia Putri
Electrical Basic Measurement by Fildia Putri
 
6 la ley de ohm
6 la ley de ohm6 la ley de ohm
6 la ley de ohm
 

Mais de UpendraSingamsetty

Smart Washing Machine Using NI LAB VIEW
Smart Washing Machine Using NI LAB VIEW Smart Washing Machine Using NI LAB VIEW
Smart Washing Machine Using NI LAB VIEW UpendraSingamsetty
 
BASIC CONCEPTS OF DATA NETWORKS AND PROTOCOLS (PART - 2)
BASIC CONCEPTS OF DATA NETWORKS AND PROTOCOLS (PART - 2)BASIC CONCEPTS OF DATA NETWORKS AND PROTOCOLS (PART - 2)
BASIC CONCEPTS OF DATA NETWORKS AND PROTOCOLS (PART - 2)UpendraSingamsetty
 
BASIC CONCEPTS OF DATA NETWORKS AND PROTOCOLS (PART - 1)
BASIC CONCEPTS OF DATA NETWORKS AND PROTOCOLS (PART - 1)BASIC CONCEPTS OF DATA NETWORKS AND PROTOCOLS (PART - 1)
BASIC CONCEPTS OF DATA NETWORKS AND PROTOCOLS (PART - 1)UpendraSingamsetty
 
Basics concepts of A I,ANN,Genetic Algorithm,Fuzzy Logic
Basics concepts of A I,ANN,Genetic Algorithm,Fuzzy LogicBasics concepts of A I,ANN,Genetic Algorithm,Fuzzy Logic
Basics concepts of A I,ANN,Genetic Algorithm,Fuzzy LogicUpendraSingamsetty
 
A GIANT LEAP OF INDIA : SUNDAR BHARATH AND FEW SYMPTOMS AND PRECAUTIONS FROM ...
A GIANT LEAP OF INDIA : SUNDAR BHARATH AND FEW SYMPTOMS AND PRECAUTIONS FROM ...A GIANT LEAP OF INDIA : SUNDAR BHARATH AND FEW SYMPTOMS AND PRECAUTIONS FROM ...
A GIANT LEAP OF INDIA : SUNDAR BHARATH AND FEW SYMPTOMS AND PRECAUTIONS FROM ...UpendraSingamsetty
 
Emerging Civil Society Initiatives In Agriculture
Emerging Civil Society Initiatives In AgricultureEmerging Civil Society Initiatives In Agriculture
Emerging Civil Society Initiatives In AgricultureUpendraSingamsetty
 

Mais de UpendraSingamsetty (12)

SMART BLIND STICK
SMART BLIND STICK SMART BLIND STICK
SMART BLIND STICK
 
Smart Washing Machine Using NI LAB VIEW
Smart Washing Machine Using NI LAB VIEW Smart Washing Machine Using NI LAB VIEW
Smart Washing Machine Using NI LAB VIEW
 
BASIC CONCEPTS OF DATA NETWORKS AND PROTOCOLS (PART - 2)
BASIC CONCEPTS OF DATA NETWORKS AND PROTOCOLS (PART - 2)BASIC CONCEPTS OF DATA NETWORKS AND PROTOCOLS (PART - 2)
BASIC CONCEPTS OF DATA NETWORKS AND PROTOCOLS (PART - 2)
 
BASIC CONCEPTS OF DATA NETWORKS AND PROTOCOLS (PART - 1)
BASIC CONCEPTS OF DATA NETWORKS AND PROTOCOLS (PART - 1)BASIC CONCEPTS OF DATA NETWORKS AND PROTOCOLS (PART - 1)
BASIC CONCEPTS OF DATA NETWORKS AND PROTOCOLS (PART - 1)
 
Basics concepts of A I,ANN,Genetic Algorithm,Fuzzy Logic
Basics concepts of A I,ANN,Genetic Algorithm,Fuzzy LogicBasics concepts of A I,ANN,Genetic Algorithm,Fuzzy Logic
Basics concepts of A I,ANN,Genetic Algorithm,Fuzzy Logic
 
HACKING
HACKINGHACKING
HACKING
 
Laser Communications
Laser CommunicationsLaser Communications
Laser Communications
 
A GIANT LEAP OF INDIA : SUNDAR BHARATH AND FEW SYMPTOMS AND PRECAUTIONS FROM ...
A GIANT LEAP OF INDIA : SUNDAR BHARATH AND FEW SYMPTOMS AND PRECAUTIONS FROM ...A GIANT LEAP OF INDIA : SUNDAR BHARATH AND FEW SYMPTOMS AND PRECAUTIONS FROM ...
A GIANT LEAP OF INDIA : SUNDAR BHARATH AND FEW SYMPTOMS AND PRECAUTIONS FROM ...
 
Emerging Civil Society Initiatives In Agriculture
Emerging Civil Society Initiatives In AgricultureEmerging Civil Society Initiatives In Agriculture
Emerging Civil Society Initiatives In Agriculture
 
Capacitor and its types
Capacitor and its typesCapacitor and its types
Capacitor and its types
 
LCD AND LED SCREEN
LCD AND LED SCREENLCD AND LED SCREEN
LCD AND LED SCREEN
 
Waste Management
Waste ManagementWaste Management
Waste Management
 

Último

Graphics Primitives and CG Display Devices
Graphics Primitives and CG Display DevicesGraphics Primitives and CG Display Devices
Graphics Primitives and CG Display DevicesDIPIKA83
 
me3493 manufacturing technology unit 1 Part A
me3493 manufacturing technology unit 1 Part Ame3493 manufacturing technology unit 1 Part A
me3493 manufacturing technology unit 1 Part Akarthi keyan
 
ASME BPVC 2023 Section I para leer y entender
ASME BPVC 2023 Section I para leer y entenderASME BPVC 2023 Section I para leer y entender
ASME BPVC 2023 Section I para leer y entenderjuancarlos286641
 
solar wireless electric vechicle charging system
solar wireless electric vechicle charging systemsolar wireless electric vechicle charging system
solar wireless electric vechicle charging systemgokuldongala
 
دليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide Laboratory
دليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide Laboratoryدليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide Laboratory
دليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide LaboratoryBahzad5
 
Best-NO1 Best Rohani Amil In Lahore Kala Ilam In Lahore Kala Jadu Amil In Lah...
Best-NO1 Best Rohani Amil In Lahore Kala Ilam In Lahore Kala Jadu Amil In Lah...Best-NO1 Best Rohani Amil In Lahore Kala Ilam In Lahore Kala Jadu Amil In Lah...
Best-NO1 Best Rohani Amil In Lahore Kala Ilam In Lahore Kala Jadu Amil In Lah...Amil baba
 
Basic Principle of Electrochemical Sensor
Basic Principle of  Electrochemical SensorBasic Principle of  Electrochemical Sensor
Basic Principle of Electrochemical SensorTanvir Moin
 
Gender Bias in Engineer, Honors 203 Project
Gender Bias in Engineer, Honors 203 ProjectGender Bias in Engineer, Honors 203 Project
Gender Bias in Engineer, Honors 203 Projectreemakb03
 
SUMMER TRAINING REPORT ON BUILDING CONSTRUCTION.docx
SUMMER TRAINING REPORT ON BUILDING CONSTRUCTION.docxSUMMER TRAINING REPORT ON BUILDING CONSTRUCTION.docx
SUMMER TRAINING REPORT ON BUILDING CONSTRUCTION.docxNaveenVerma126
 
Design of Clutches and Brakes in Design of Machine Elements.pptx
Design of Clutches and Brakes in Design of Machine Elements.pptxDesign of Clutches and Brakes in Design of Machine Elements.pptx
Design of Clutches and Brakes in Design of Machine Elements.pptxYogeshKumarKJMIT
 
Technology Features of Apollo HDD Machine, Its Technical Specification with C...
Technology Features of Apollo HDD Machine, Its Technical Specification with C...Technology Features of Apollo HDD Machine, Its Technical Specification with C...
Technology Features of Apollo HDD Machine, Its Technical Specification with C...Apollo Techno Industries Pvt Ltd
 
IT3401-WEB ESSENTIALS PRESENTATIONS.pptx
IT3401-WEB ESSENTIALS PRESENTATIONS.pptxIT3401-WEB ESSENTIALS PRESENTATIONS.pptx
IT3401-WEB ESSENTIALS PRESENTATIONS.pptxSAJITHABANUS
 
Power System electrical and electronics .pptx
Power System electrical and electronics .pptxPower System electrical and electronics .pptx
Power System electrical and electronics .pptxMUKULKUMAR210
 
Clutches and brkesSelect any 3 position random motion out of real world and d...
Clutches and brkesSelect any 3 position random motion out of real world and d...Clutches and brkesSelect any 3 position random motion out of real world and d...
Clutches and brkesSelect any 3 position random motion out of real world and d...sahb78428
 
Summer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdf
Summer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdfSummer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdf
Summer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdfNaveenVerma126
 
nvidia AI-gtc 2024 partial slide deck.pptx
nvidia AI-gtc 2024 partial slide deck.pptxnvidia AI-gtc 2024 partial slide deck.pptx
nvidia AI-gtc 2024 partial slide deck.pptxjasonsedano2
 
UNIT4_ESD_wfffffggggggggggggith_ARM.pptx
UNIT4_ESD_wfffffggggggggggggith_ARM.pptxUNIT4_ESD_wfffffggggggggggggith_ARM.pptx
UNIT4_ESD_wfffffggggggggggggith_ARM.pptxrealme6igamerr
 

Último (20)

Présentation IIRB 2024 Marine Cordonnier.pdf
Présentation IIRB 2024 Marine Cordonnier.pdfPrésentation IIRB 2024 Marine Cordonnier.pdf
Présentation IIRB 2024 Marine Cordonnier.pdf
 
Lecture 4 .pdf
Lecture 4                              .pdfLecture 4                              .pdf
Lecture 4 .pdf
 
Graphics Primitives and CG Display Devices
Graphics Primitives and CG Display DevicesGraphics Primitives and CG Display Devices
Graphics Primitives and CG Display Devices
 
me3493 manufacturing technology unit 1 Part A
me3493 manufacturing technology unit 1 Part Ame3493 manufacturing technology unit 1 Part A
me3493 manufacturing technology unit 1 Part A
 
ASME BPVC 2023 Section I para leer y entender
ASME BPVC 2023 Section I para leer y entenderASME BPVC 2023 Section I para leer y entender
ASME BPVC 2023 Section I para leer y entender
 
solar wireless electric vechicle charging system
solar wireless electric vechicle charging systemsolar wireless electric vechicle charging system
solar wireless electric vechicle charging system
 
دليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide Laboratory
دليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide Laboratoryدليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide Laboratory
دليل تجارب الاسفلت المختبرية - Asphalt Experiments Guide Laboratory
 
Best-NO1 Best Rohani Amil In Lahore Kala Ilam In Lahore Kala Jadu Amil In Lah...
Best-NO1 Best Rohani Amil In Lahore Kala Ilam In Lahore Kala Jadu Amil In Lah...Best-NO1 Best Rohani Amil In Lahore Kala Ilam In Lahore Kala Jadu Amil In Lah...
Best-NO1 Best Rohani Amil In Lahore Kala Ilam In Lahore Kala Jadu Amil In Lah...
 
Basic Principle of Electrochemical Sensor
Basic Principle of  Electrochemical SensorBasic Principle of  Electrochemical Sensor
Basic Principle of Electrochemical Sensor
 
Gender Bias in Engineer, Honors 203 Project
Gender Bias in Engineer, Honors 203 ProjectGender Bias in Engineer, Honors 203 Project
Gender Bias in Engineer, Honors 203 Project
 
計劃趕得上變化
計劃趕得上變化計劃趕得上變化
計劃趕得上變化
 
SUMMER TRAINING REPORT ON BUILDING CONSTRUCTION.docx
SUMMER TRAINING REPORT ON BUILDING CONSTRUCTION.docxSUMMER TRAINING REPORT ON BUILDING CONSTRUCTION.docx
SUMMER TRAINING REPORT ON BUILDING CONSTRUCTION.docx
 
Design of Clutches and Brakes in Design of Machine Elements.pptx
Design of Clutches and Brakes in Design of Machine Elements.pptxDesign of Clutches and Brakes in Design of Machine Elements.pptx
Design of Clutches and Brakes in Design of Machine Elements.pptx
 
Technology Features of Apollo HDD Machine, Its Technical Specification with C...
Technology Features of Apollo HDD Machine, Its Technical Specification with C...Technology Features of Apollo HDD Machine, Its Technical Specification with C...
Technology Features of Apollo HDD Machine, Its Technical Specification with C...
 
IT3401-WEB ESSENTIALS PRESENTATIONS.pptx
IT3401-WEB ESSENTIALS PRESENTATIONS.pptxIT3401-WEB ESSENTIALS PRESENTATIONS.pptx
IT3401-WEB ESSENTIALS PRESENTATIONS.pptx
 
Power System electrical and electronics .pptx
Power System electrical and electronics .pptxPower System electrical and electronics .pptx
Power System electrical and electronics .pptx
 
Clutches and brkesSelect any 3 position random motion out of real world and d...
Clutches and brkesSelect any 3 position random motion out of real world and d...Clutches and brkesSelect any 3 position random motion out of real world and d...
Clutches and brkesSelect any 3 position random motion out of real world and d...
 
Summer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdf
Summer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdfSummer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdf
Summer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdf
 
nvidia AI-gtc 2024 partial slide deck.pptx
nvidia AI-gtc 2024 partial slide deck.pptxnvidia AI-gtc 2024 partial slide deck.pptx
nvidia AI-gtc 2024 partial slide deck.pptx
 
UNIT4_ESD_wfffffggggggggggggith_ARM.pptx
UNIT4_ESD_wfffffggggggggggggith_ARM.pptxUNIT4_ESD_wfffffggggggggggggith_ARM.pptx
UNIT4_ESD_wfffffggggggggggggith_ARM.pptx
 

Basic Information of Ohm's law

  • 2. Ohm's law magic triangle
  • 3. Ohms law, defines the relationship between voltage, current and resistance. These basic electrical units apply to direct current, or alternating current. Ohm’s Law is the foundation of electronics and electricity. This formula is used extensively by electricians. Without a thorough understanding of “Ohm’s Law” an electrician can not design or troubleshoot even the simplest of electronic or electrical circuits. Ohm established in the late 1820’s that if a voltage was applied to a resistance then “current would flow and then power would be consumed”.
  • 4. Voltage measured in volts, symbolized by the letters "E" or "V". Current measured in amps, symbolized by the letter "I". Resistance measured in ohms, symbolized by the letter "R".
  • 6. If you know E and I, and wish to determine R, just eliminate R from the picture and see what's left:
  • 7. If you know E and R, and wish to determine I, eliminate I and see what's left:
  • 8. if you know I and R, and wish to determine E, eliminate E and see what's left:
  • 9. Let's see how these equations might work to help us analyze simple circuits: If we know the values of any two of the three quantities (voltage, current, and resistance) in this circuit, we can use Ohm's Law to determine the third.
  • 10. calculate the amount of current (I) in a circuit, given values of voltage (E) and resistance (R):
  • 11. calculate the amount of resistance (R) in a circuit, given values of voltage (E) and current (I):
  • 12. calculate the amount of voltage supplied by a battery, given values of current (I) and resistance (R):
  • 13. Ohm’s Law power consumption through a resistance Some practical every day examples of this basic rule are: base board heaters, electric frying pans, toasters and electric light bulbs. The heater consumes power producing heat for warmth, the frying pan consumes power producing heat for general cooking, the toaster consumes power producing heat for cooking toast, and the electric light bulb consumes power producing heat and more important light. A further example is an electric hot water system. All are examples of Ohm’s Law.
  • 25. As a milliampere (milliamp or just mA) is 1/1000th of an ampere, we can convert mA to Amps by just dividing by 1000. Another way is to take the current in mA and move the decimal to the left three places to accomplish the division by 1000. Here's the scoop: 275 mA / 1000 = 0.275 Amps Note that the decimal in 275 is to the right of the 5, and it's written as 275.0 (with a 0 added to show where the decimal is). Moving the decimal to the left three places gets up to .275 Amps, but we usually hang a 0 in front of the decimal. To convert Amps to milliAmps, just multiply by 1000 or move the decimal to the right three places. Just the opposite of what we did here to convert the other way.