Chapter 5- Ohm’s Law Landstown High School Governors STEM & Technology Academy.

Slides:



Advertisements
Similar presentations
PSAA Curriculum Unit Physical Science Systems. Problem Area Energy and Power Systems.
Advertisements

Circuits.
Series and Parallel Circuits
Unit 8 Combination Circuits
Unit 8 Combination Circuits
Unit 7 Parallel Circuits
Chapter 7 Parallel Circuits. Chapter 7 Parallel Circuits.
Direct Current Circuits
Parallel Circuits ENTC 210: Circuit Analysis I Rohit Singhal Lecturer Texas A&M University.
EET Survey of Electronics Chapter 14 - Series-parallel circuits.
Chapter 5 & 6 Dr. Farid Farahmand CET 236. Outline Identify a series/parallel circuit Determine the current and voltage in a circuit Determine total resistance.
Verification of OHM’s law By: Engr.Irshad Rahim Memon.
Lecture 2 Basic Circuit Laws
Previous Lecture Energy and Power Power in an Electric Circuit
Series and Parallel Circuits. Circuits  Can either be series or parallel.
1 © Unitec New Zealand DE4401&APTE 5601 Topic 3 DC CIRCUITS K IRCHHOFF ’ S LAWS V OLTAGE AND CURRENT DIVIDERS.
electronics fundamentals
Resistance and Ohm’s Law: More Practice
Kirchhoff’s Laws Laws of Conservation.
Series, Parallel, and Series- Parallel Circuits
FCI. Direct Current Circuits: 3-1 EMF 3-2 Resistance in series and parallel. 3-3 Rc circuit 3-4 Electrical instruments FCI.
1 DC ELECTRICAL CIRCUITS COMBINATION SERIES PARALLEL CIRCUITS.
Basic Electric Circuits. A series connection has a single path from the battery, through each circuit element in turn, then back to the battery. Resistors.
CHAPTER Series, Parallel, and Series-Parallel Circuits 5 Copyright © 2016 by Pearson Education, Inc. All Rights Reserved Automotive Electrical and Engine.
a b  R C I I R  R I I r V Yesterday Ohm’s Law V=IR Ohm’s law isn’t a true law but a good approximation for typical electrical circuit materials Resistivity.
Series and Parallel Circuits How to find the resultant resistance of an electronic circuit.
Chapter 8 DC Circuits. 2 Objectives –After completing this chapter, the student should be able to: Solve for all unknown values, (current, voltage, resistance,
Series and Parallel Circuits Series circuits Parallel circuits Series-parallel circuits.
Series Circuits EE 2010: Fundamentals of Electric Circuits Mujahed AlDhaifallah.
1 AGBell – EECT by Andrew G. Bell (260) Lecture 5.
Introduction to Electrical Circuits Unit 17. Sources of emf  The source that maintains the current in a closed circuit is called a source of emf Any.
Chapter 19 DC Circuits. Objective of the Lecture Explain Kirchhoff’s Current and Voltage Laws. Demonstrate how these laws can be used to find currents.
Unit 4- Building from Schematics--Continued EET 110 Electronics Survey I.
Chapter 10 The Math for Kirchhoff Voltage and Current Laws along with Polarity in DC Circuits.
Chapter 28 Direct Current Circuits. Introduction In this chapter we will look at simple circuits powered by devices that create a constant potential difference.
1 HVACR216 - Hydronics Basic Circuits and Ohms Law.
The Parallel Circuit Total Resistance Kirchoff’s Current Law
Lecture 2: Circuit Elements and Series/Parallel Resistors Nilsson , ENG17 (Sec. 1): Circuits I Summer June 24, 2014.
Kirchhoff’s Rules.
Circuit Theory Tashfeen Khan. Introduction This chapter mainly deals with laws that are used to find currents, voltages and resistances in a circuit.
 Solving a circuit consists of finding unknown currents, the current direction, and the voltages in a circuit.  A multiloop circuit has more than one.
Regents Physics Parallel Circuits –Ohm’s Law in Parallel Circuits.
Chapter 27 Lecture 23: Circuits: I. Direct Current When the current in a circuit has a constant direction, the current is called direct current Most of.
Ohm’s Law Resistance in Series Circuits
Kirchhoff’s Laws Kirchhoff’s Current Law Kirchhoff’s Voltage Law Series Circuits Parallel Circuits Polarity.
ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Fourth Edition, by Allan R. Hambley, ©2008 Pearson Education, Inc. Lecture 3 Circuit Laws, Voltage.
Electric Circuits. Electric circuit: a complete path from the positive terminal to the negative terminal.
Week 6 Day 1. Units to be measured and calculated VoltageVoltsV or E ResistanceOhmsR or Ω Current AmpsI or A PowerWattW or P.
Chapter 5 Ohm’s Law. 2 Objectives –After completing this chapter, the student should be able to: Identify the three basic parts of a circuit. Identify.
Chapter 6 Principles of Electric Circuits, Conventional Flow, 9 th ed. Floyd © 2010 Pearson Higher Education, Upper Saddle River, NJ All Rights.
DC Circuits DC Circuits. Overview Ohms Law and Power Series Circuits Parallel Circuits Series Parallel circuits.
Chapter 5 Ohm’s Law. Objectives After completing this chapter, you will be able to: –Identify the three basic parts of a circuit –Identify three types.
Chapter 14 Resistive AC Circuits. 2 Objectives –After completing this chapter, the student should be able to: Describe the phase relationship between.
Series and Parallel Circuits SNC1D. Series and Parallel Circuits Key Question: How do series and parallel circuits work?
Chapter 6.
Chapter 14 Resistive AC Circuits.
Unit 7 Parallel Circuits
Direct Current Circuits
A B C Which of the circuits shown above are wired in parallel?
Direct Current Circuits
Chapter 5 Ohm’s Law.
Electric Circuits Fundamentals
Series vs Parallel Circuits
Kirchhoff's Rules.
Ohm’s Law This formula shows the relationship between current, voltage and resistance. Voltage (Volts) Current (Amps) Resistance (Ohms, )
What formula is used to calculate current in a circuit?
Series and Parallel Circuits
Series and Parallel Circuit
Chapter 6.
Automotive Technology Principles, Diagnosis, and Service
Presentation transcript:

Chapter 5- Ohm’s Law Landstown High School Governors STEM & Technology Academy

Electric circuits – The path that the current follows is called an electric circuit. – All electric circuits consist of: A voltage source. A load. A conductor. 2

Three types of circuits – Series circuit 3

– Parallel circuit 4

– Series-parallel circuit 5

Closed circuit 6 Open circuit Open and Closed Circuits

Current flow can be varied by: – Changing the voltage applied to the circuit. Voltage increases, current increases. Voltage decreases, current decreases. – Changing the resistance in the circuit. Resistance increases, current decreases. 7

OHM’S LAW The current in an electrical circuit is directly proportional to the voltage and inversely proportional to the resistance in a circuit. 8

9 I = current in amperes. E = voltage in volts. R = resistance in ohms. Finding the Current (I) Value

10 E= I x R I = current in amperes. E = voltage in volts. R = resistance in ohms. Finding the Voltage (E) Value

11 R = E/I I = current in amperes. E = voltage in volts. R = resistance in ohms. Finding the Resistance (R) Value

In a series circuit, the same current flows throughout the circuit. I T = I R1 = I R2 = I R3... = I Rn The total voltage in a series circuit is equal to the voltage drop across the individual loads in the circuit. E T = E R1 + E R2 + E R E Rn 12 Rules

3 Formulas E = I x R (Voltage = Current multiplied by Resistance) R = E / I (Resistance = Voltage divided by Current) I = E / R (Current = Voltage Divided by Resistance) 13

The total resistance in a series circuit is equal to the sum to the individual resistances in the circuit. R T = R 1 + R 2 + R R n 14

In a parallel circuit, the same voltage is applied to each branch in the circuit. E T = E R1 = E R2 = E R3... = E Rn The total current in a parallel circuit is equal to the sum of the individual branch currents in the circuit. I T = I R1 + I R2 + I R I Rn 15

To determine unknown quantities in a circuit: – Draw a schematic of the circuit. – Label all known quantities. – Solve for equivalent circuits. – Redraw the circuit. – Solve. 16

Kirchhoff’s Law – In 1847 G. R. Kirchhoff extended Ohm’s law with two important statements. – Kirchhoff’s current law: The algebraic sum of all the currents (I) entering and leaving a junction is equal to zero. I T = I 1 + I 2 + I 3 17 – Kirchhoff’s voltage law The algebraic sum of all the voltages (E) around a closed circuit equals zero. E T = E 1 + E 2 + E 3

In summary: – Electric circuit Voltage source Load Conductor – Current path Series Parallel Series-parallel 18 – Current flow Negative to positive Varied by changing the voltage or the resistance.

19