Video http://www.youtube.com/watch?v=E27XDNf2cxc.

Slides:

Advertisements

Similar presentations

ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.

Advertisements

Series and Parallel Circuits

Unit 7 Parallel Circuits

Lecture Ten Physics 100 Fall 2012  Series and Parallel Circuits.

xc.  Ohm’s Law explains the relationship between voltage (V or E), current (I) and resistance (R)  Used by.

Chapter 5 (Ohm’s Law) **Hand in Extra Assignment  Prepare for the lab  Do the lab  Complete the lab write up  Hand in the formal lab for Monday.

Current and Resistance

Do Now (10/14/13):  What is Ohm’s Law?  What do you know about electric circuits?  In your own words, what is electric current?

As a group What is electricity made of?

Series and Parallel Circuits. Ohm’s Law I = V / R Georg Simon Ohm ( ) I= Current (Amperes) (amps) V= Voltage (Volts) R= Resistance (ohms)

Making Sense of Circuits.  How much an object resists electricity flowing  Increasing resistance, lowers the current  Measured in Ohms (Ω)

ELECTRICAL CIRCUITS. Ohm’s Law I = V / R Georg Simon Ohm ( ) I= Current (Amperes) (amps) V= Voltage (Volts) R= Resistance (ohms)

ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.

Calculating Electricity

ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.

Ohm’s Law V = I x R Georg Simon Ohm ( ) I= Current (Amperes or amps) V= Voltage (Volts) R= Resistance (ohms)

Physics Electricity. Review Circuits are fairly simple to solve, but only involve MOVING charges. Remember the point charges we did the other day? If.

CHAPTER TWO CONTINUED. VOLTAGE Electrical pressure or potential The Electromotive force that causes the movement of electons Electrical pressure is measured.

Electrical Systems. VOCABULARYOBJECTIVES  Series circuit  Voltage drop  Kirchoff’s Voltage Law Describe a series circuit. Calculate the resistance.

describes the relationship between current, voltage, and resistance greater the voltage across a device with resistance, the greater the current through.

ELECTRIC CHARGES AND CURRENT. WHAT IS THE DIFFERENCE? Static Electricity and Electrical Current is made of the same thing, electrons. However, in static.

 It is the push or pressure behind current flow through a circuit, and is measured in (V) volts.

OHM’S LAW The mathematical relationship between voltage, current, and resistance.

THS Automotive Technology Fundamental Principles of Electricity Lesson 2: Electrical Measurement and Ohm’s Law Electrical Measurements and Ohm’s Law.

Amperes, Volts and Ohms. We use different units to measure different things: We use different units to measure different things: Time – minutes Time –

Electricity and Circuit. Types of Electricity Static Electricity – no motion of free charges Current Electricity – motion of free charges – Direct Current.

Circuit Electricity. Circuit Builder Interactive: Builder/Circuit-Builder-Interactive.

ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.

Using a Mulitmeter A digital multimeter is a test tool used to measure two or more electrical values—principally voltage (volts), current (amps) and resistance.

ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.

Determining Equivalent Resistance

Electricity and Circuit

through a conducting metal

Aim: How is a Series Circuit different from a Parallel Circuit?

ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.

Do Now: Why does current not come from a battery? Explain.

How to Work Electrical Circuits

Introduction to Electricity

Circuit Introduction Section 1:

Chapter 17 Section 2: Current.

Chapter 7 section 2 Electric Current

ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.

ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.

ELECTRICAL Currents & Energy

ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.

ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.

Electrical Circuits.

ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.

ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison Lesson Objectives: To explain the difference.

Electrical Circuits.

ELECTRICAL Currents & Energy

ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.

Electrons in Circuits. Electrons in Circuits Parts of a circuit Battery Closed switch (allows electrons to flow) Open switch (impedes flow) Wire Resistor.

What is Electricity? Electricity is the flow of electrical charge because electrons start to move. All matter is made of atoms that contain electrons The.

ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.

ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.

ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.

ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.

ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.

Title: 2/28 ELECTRICAL CIRCUITS

Series and Parallel Circuits

Electric Circuits Chapter 35.

Electric Circuits.

ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.

ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.

Current and Ohms law.

Presentation transcript:

Video http://www.youtube.com/watch?v=E27XDNf2cxc

OHMS LAW

What is ohms law? Ohm’s Law explains the relationship between voltage (V ), current (I) and resistance (R) Used by electricians, automotive technicians, stereo installers

VOLTAGE (V) It is the push or pressure behind current flow through a circuit. Measured in (V) volts.

How you should be thinking about electric circuits: Voltage: a force that pushes the current through the circuit (in this picture it would be equivalent to gravity)

CURRENT Current refers to the quantity of electrical flow. Measured in Amps (A)

How you should be thinking about electric circuits: Current: the actual “substance” that is flowing through the wires of the circuit (electrons!)

RESISTANCE Resistance to the flow of the current. Measured in Ohms

How you should be thinking about electric circuits: Resistance: friction that impedes flow of current through the circuit (rocks in the river)

Chart

General Rule. 1. Assuming the resistance does not change: As voltage increases, current increases. as voltage decreases, current decreases. 2. Assuming the voltage does not change: As resistance increases, current decreases. As resistance decreases, current increases.

Part 2 http://www.youtube.com/watch?v=eZ9Xk0Lln5Y&feature=related Stop at 1 Min mark

How do we used Ohms law

V = I x R I = V R R = V I

How do calculate? Battery voltage is 12V Resistance 2 Ohm What is the Current?

How to calculate? Voltage is 12V Current is 4 Amps What is the Resistance? ____Ohms?

What can we use to measure? Multi meters/ DVOM

Resistors Why do we need resistors To decrease the amount of voltage applied to a component The value of the resistor is marked on the body using coloured rings

Resistors

RECAP!! What is Voltage? What is Current? What is Resistance? http://www.youtube.com/watch?v=nj7ewZmG3eo&feature=related

Part 3 http://www.youtube.com/watch?v=YB_JCUw9SoU&feature=related

Different types of circuit Series circuit : One pathway for current to flow. Example: Old Christmas lights

Parallel Circuit More then one path way for current to flow. Used in most electrical vehicle circuits.