Today we are going to look at: Current: Measured in “Amperes” or “Amps” (A) “The rate of flow of electrons through a circuit” Voltage: Measured in “Volts”

Slides:

Advertisements

Similar presentations

Calculating Resistance

Advertisements

Ohms Law Benchmark Companies Inc PO Box Aurora CO

Unit 7 Parallel Circuits

Use Ohm’s Law to solve the following equations.

Ohm’s Law Review. Division Review 15 ÷ ÷ ÷ 2.3.

 Over 400 deaths occur annually from electric shock  Half of all deaths occur with low voltage outlets  On the job site, one death per day and

Ohm’s Law The most important fundamental law in electronics is Ohm’s law, which relates voltage, current, and resistance. Georg Simon Ohm ( ) studied.

Current, Voltage, and Resistance in a circuit

Amps, Volts and Ohms Units of Electrical Measurement.

Ohm’s Law. Would this work? 1. Yes 2. No Would this work? 1. Yes 2. No.

Electricity. Starter:  What is current?  What is it measured in?  What is it measured by?  Which is the series and parallel circuit? (see board)

Basic Electrical Theory: Understanding Ohm’s Law Copyright © Texas Education Agency, All rights reserved.

Voltage: the charge (electron) “pusher.” Voltage causes current to flow/move. Voltage sources: Battery Generator Outlets Symbol for voltage = V Unit for.

A Falkirk High School presentation Ohm’s Law For each of the questions, click the letter of the correct answer Click to start the test.

Copyright © Texas Education Agency, All rights reserved.

Chapter Twenty: Electric Circuits

Warmup: Concept: OHM’s Law. Electrical current is a measure of the rate at which electrical charge moves in a circuit. Electrical current is measured.

Electrical Resistance Activity. Curriculum Big Idea: Energy can be transferred between objects and/or can be converted into different forms. Concept:

Physics Module 2. What you need to learn Circuit symbols Measuring current and voltage in series and parallel circuits Current/Voltage graphs for certain.

1 Module-1 Ohm ’ s law. 2 By the end of this lesson, the student will be able to: 1-Use prefixes to convert electrical quantities. 2-State Ohm's Law and.

Electrical Current Mr. Fleming.

OHM’S LAW a. To know the difference between current, voltage and resistance. b. To appreciate the contribution of Georg Simon in the field of electricity.

Calculating Electricity

Ohm’s Law and Electrical Power

EE2010 Fundamentals of Electric Circuits

1 HVACR216 - Hydronics Basic Circuits and Ohms Law.

ELECTRICAL COMPONENTS and CIRCUITS Instrumental Analysis II CTEC 1345.

CHAPTER 2 ELECTRICAL QUANTITIES AND OHM’S LAW. OBJECTIVE. AFTER TODAY, STUDENTS WILL UNDERSTAND THE ELECTRICAL VALUES OF AMPS, VOLTS, OHMS,AND WATTS.

2 But what makes the electrons flow? Any electrical circuit requires three things 1.A source 2.A load 3.A means of transmission A definition of a current.

Ohm’s Law The relationship between Voltage, Current and Resistance in any DC electrical circuit was firstly discovered by the German physicist Georg Ohm,

Ohm’s Law Calculating Current, Voltage, and Resistance.

Previous Lecture 2 Review of V, I, and R

Electric Current Chapter 7-2. Electric Circuit F A closed path through which electrons can flow F Electrons flow because of a difference in potential.

Chapter 8. Ohm’s Law  George Ohm experimented with circuits and came up with a mathematical relationship relating voltage, current and resistance in.

T By iTutor.comiTutor.com.

Oneone GTE-8A Objective: To use Ohm’s Law relationships to determine voltage, current, and resistance in simple circuits. Energy Note: How are current.

Introduction to Physics. What is physics?  Physics is a branch of science that involves the study of the physical world: energy, matter, and how they.

Electricity and Electronics. Sepperated into TWO groups Electricity – It is the ongoing flow of electrons. Electronica – It is the Science of how we control.

What we will do today Define the term ‘potential difference’. Look at the ratio V/I for a resistor. Define an equation relating resistance, voltage and.

Series & Parallel Circuits

You will need to read the section on power, do the assigned problems so that you are an expert. Also be able to derive the expressions for power from ohms.

Electric Current. Electric Current (I) The net movement of electric charges in a single direction ▫Unit - amperes  Symbol – A  Measurement instrument.

Ohm’s Law Notes JAN 7. Vocabulary current : how quickly the electrons are flowing through the circuit; units: amperes (A) voltage : the electric potential.

Solving Problems 14.1 & A circuit contains 5-ohm, 3-ohm, and 8-ohm resistors in series. What is the total resistance of the circuit? Rt = R1.

Power in Electrical Systems Power in Electrical Systems.

Ohm's law magic triangle V = I R. Ohms law, defines the relationship between voltage, current and resistance. These basic electrical units apply to direct.

Current and Power Calculations Practice Math once again!!!

Page 1 Ohm’s Law Engineering Science. Page 2 Introduction Ohm’s Law is named after Georg Simon Ohm who was a German Physicist and Mathematician. He discovered.

Ohm’s Law Aim: How does voltage and resistance affect current flow?

Ohm’s Law. Georg Simon Ohm born March 16, 1789, Erlangen, Bavaria [Germany]—died July 6, 1854, Munich German physicist who discovered the law, named after.

Current Electricity.

Aim: How do we determine the power in a circuit?

KS4 Electricity – Resistance, Power and Energy

Current electricity.

Electric circuits e the significance of and the relationship between current, voltage and resistance.

8.3 Resistance and Ohm’s Law

JC Technology Electric Circuits.

Ohm's law magic triangle

Ohm’s Law The relationship between voltage, current and resistance is known as Ohm’s Law: V = IR Voltage (V) = Current (I) x Resistance (R) Volts.

Electric Current Chapter 6-2.

Basic Electrical Calculations

Electric Current 6.2.

Electric Current.

What formula is used to calculate current in a circuit?

Chapter Twenty: Electric Circuits

Ohm’s Law & Circuits Chapter 7.2 & 7.3.

Presentation transcript:

Today we are going to look at:

Current: Measured in “Amperes” or “Amps” (A) “The rate of flow of electrons through a circuit” Voltage: Measured in “Volts” (V) “Used to drive the electrons through the components” Resistance: Measured in “Ohm’s” (  ) “A measure of how much voltage is required to let a current flow”

Georg Simon Ohm ( ) Ohm formulated the relationship between voltage, current & resistance as follows. “The current in a circuit is directly proportional to the applied voltage and inversely proportional to the resistance of the circuit”

“Voltage (V) is equal to the current (I) multiplied by the resistance (R)

If we use a triangle to help us, then we can arrange the formula to make it easier to use. V IR This gives us the formula’s V = I x R V I = R V R = I

Example 1: Voltage Q: The resistance of a circuit is 12  and the current is 2A. What is the voltage? Step 1: Draw Triangle V IR Step 2: Select correct equation V = I x R

Step 3: Plug in the numbers V = ?I = 2A& R = 12  Step 4: Calculate V = 2 x 12 Step 5: Solution V = 24V Don’t Forget the units!

Now you try one! Q: The resistance of a circuit is 15  and the current is 3A. What is the voltage?

Example 2: Current Q: The voltage supply is 25V and the resistance is 5 . What is the current Step 1: Draw Triangle V IR Step 2: Select correct equation V I = R

Step 3: Plug in the numbers V = 25VI = ?R = 5  Step 4: Calculate I = 25  5 Step 5: Solution I = 5A Don’t Forget the units!

Now you try one! Q: The voltage supply is 40V and the resistance is 10 . What is the current?

Example 3: Resistance Q: The voltage supply is 300V and the current is 2A. What is the resistance? Step 1: Draw Triangle V IR Step 2: Select correct equation V R = I

Step 3: Plug in the numbers V = 300VI = 2AR = ? Step 4: Calculate R = 300  2 Step 5: Solution R = 150  Don’t Forget the units!

Now you try one! Q: The voltage supply is 500V and the current is 50A. What is the resistance?