Our power points consist of two components, with an optional third Active Neutral Earth (optional)

Slides:



Advertisements
Similar presentations
Voltage and resistance in a circuit
Advertisements

Unit 10 - Electricity.
Chapter 19 Flow of Electricity Useful electricity requires moving electric charges You must do work to move a charged particle against an electric field.
Electricity Notes Electric Charges – all things have electric charges.
What is included in a circuit diagram?
Quarter 3 Test 2 Review. 1 Typically, household appliances operate at 120 volts. What is the current flowing in the circuit of a microwave when the resistance.
Chapter : 7 : Mains Electricity
20.3 Electric Circuits Key Concepts What is included in a circuit diagram? How do series and parallel circuits differ? How do you calculate electrical.
Electricity.
Circuits 6-1.
ELECTRICITY NOTES. ELECTRICITY ELECTRICITY: form of energy that occurs when electrons move from place to place Electricity can form whenever (e - ) electrons.
Electricity. Starter:  What is current?  What is it measured in?  What is it measured by?  Which is the series and parallel circuit? (see board)
Circuits & Electronics
To bring electric current into a building, an electrician installs wiring. In a house, all of the wires usually come from one main box.
Generating and Using Electricity
1 Electricity Chapter Charged objects Neutral Equal positive and negative charges Positive Fewer negative charges (lost electrons) Negative More.
P  German physicist Georg Ohm ( ) found relationship between potential difference & current.  He kept potential difference & current.
Chapter Twenty One: Electrical Systems
CIRCUITS AND CURRENT The build up of stationary electric charges (positive and negative) on two different surfaces. Caused by the TRANSFER of electrons.
Practical Electricity
Beath High School - Int 1 Physics1 Intermediate 1 Physics Practical Electricity Glossary ammeter to circuit circuit breaker to consumer unit continuity.
Electric Circuits Recall: Terminal = electrode = +ve and –ve ends Metal component on cell that supplies electrons (-ve) or receives electrons (+ve) Must.
Chapter 17 & 18 Discovery Notes.
20.3 Electric Circuits
Chapter 18 Electric Currents. Objectives After studying the material of this chapter, the student should be able to: Use the equations for electric power.
Practical Electricity. Recap…  5 important formulae: Q = Charge (Coulomb) I = Current (Ampere) t = time (second) V = Voltage or potential.
Physics Module 2. What you need to learn Circuit symbols Measuring current and voltage in series and parallel circuits Current/Voltage graphs for certain.
Warm-Up: 1. What does it mean for a particle to have a “charge”? 2. When do you observe static electricity?
Our power points consist of two components, with an optional third Active Neutral Earth (optional)
Electricity. What is electricity? Electric current – flow of electrons through a _______ Current (I) is measured by how many __________pass a given point.
Electric Circuits Series and Parallel Circuits. Circuit Diagrams An electric circuit is a complete path through which charge can flow Circuit diagrams.
2.2. Electric Circuits Recall: Terminal = electrode = +ve and –ve ends Metal component on cell that supplies electrons (-ve) or receives electrons (+ve)
Electrical Circuits. Objectives Objectives – Explain how electrical energy is supplied to devices in a circuit. – Use electrical symbols to draw simple.
11.4 Electric Circuits *Identify parts of a circuit *Trace the path of electrons through two types of circuits *Compare series and parallel circuits *Predict.
Physical Science Mr. Barry. Series circuits have one loop through which current can flow.
CHAPTER 17 ELECTRICITY. ELECTRIC CHARGE Charges Exert Force Atoms are composed of particles with ­charges. The law of electric charges states that like.
Electricity The Science Channel “Understanding Electricity”:
Electrical Circuits Parts of a simple circuit: Wire Load
Our power points consist of two components, with an optional third Active Neutral Earth (optional)
Electrical Safety "Shocking Statistics“  There are approximately 290 accidental electrocutions each year.  An additional 800 people die in fires caused.
Electrical Circuits Chapter 20 Section Three. Science Journal Entry #42 Expound upon Ohm’s Law and its relationship to current, resistance, and voltage.
ELECTRIC POWER. POWER AT HOME When you plug in a device, you are using alternating current (AC) Both (+) and (-) … alternates at 60x /second (60Hertz)
Electric Current Everything (water, heat, smells, …) flows from areas of high concentration to areas of lower concentration. Electricity is no different.
Static Electricity Circuits Part Deux Safety In the House
Domestic Circuits – Learning Outcomes
Electrical Current & Circuits. Components of an electrical circuit Source of electrical energy (battery) A conductor of electrical energy (wire) Device.
Chapter 2; Lesson 2.1 T.O.C: Charge Needs a Continuous Path to Flow.
Electrical Safety. What is a short circuit? Connection that allows current to take the path of least resistance. Easiest possible path. Path with the.
7.5 Electrical energy and power Electrical fundamentals Physics 2AB.
Electrical Circuits Section 7.3. Electrical Circuits Circuits rely on generators at power plants to produce a voltage difference across the outlet, causing.
Electricity and Circuits
Chapter 17: Introduction to Electricity
Circuits.
Introducing Current Electricity
Electricity Notes Electric Charges – all things have electric charges.
Energy Consumption: HOME.
Electricity 7-3 Circuits.
Electric Circuits Chapter 22 Section 3.
BATTERIES And ELECTRICAL CIRCUITS.
Electrical Safety in the Home
Topic H: Electrical circuits Fuses/circuit breakers and energy usage
Current Electricity.
Creating Circuit Diagrams
ELECTRIC BILLS YOUR ELECTRIC BILL.
Direct and Alternating Current
Chapter 4 – Ohm’s Law, Power and Energy
Energy Consumption: HOME.
A. Touching both terminals with the hands can cause electrical shock
Chapter 17: Introduction to Electricity
Presentation transcript:

Our power points consist of two components, with an optional third Active Neutral Earth (optional)

 This is a typical diagram for wiring of an appliance.  Note Earth is there for safety, and not used in all appliances.

 The active end is connected to the active supply and puts out an oscillating +340v to - 340v or 240v RMS  The neutral end is connected to the neutral terminal of the supply box. This is then connected to the Earth, with a rod into the ground.  So the electricity flows out of the active and into the neutral.

 October 2002, Norway) It's a well-known fishing trick. Put 12V electrodes into the ground if you want worms come to the surface. One 23-year- old Laagendalsposten man withdrew his genes form the pool when he tried to speed up the process. He figured that 220V, 50Hz, would bring more worms out faster, and he decided to test his theory. Alas, he did so squatting on a steel bucket, one hand holding an electrode while the other was embedded in the ground a few feet away. He seemed determined to enter the eternal fishing grounds. Quicker than spit, that wish was granted.

 Over the next few slides, a few pictures of dangerous electricity practices, write down why it’s not good and what you could do to improve it.

 Split into groups of 4  Find out about 1. What kind of Voltage can kill someone? 2. What effect does current have on the human body? In respect to exposure time and/or amount of current. 3. How would you treat someone who has been shocked? 4. Name a piece of medical equipment that uses or measures electrical activity and discuss how it works. 5. Discuss with class.

 Damaged extension cords or appliances can ‘leak’ electricity.  This leak can result in a short circuit, damaging the appliance or even you.  To stop this from happening, older buildings used fuses.  A fuse will melt if it has too much current and create an open circuit.

 Newer buildings and large supply boxes use circuit breakers.  If they detect a high load of current, they will open, creating an open circuit.

 Out of your power point, we run 240v AC  The power is supplied at 10 Amperes  What is the power at a power point?

 Being AC, this means the direction of the flow current changes.

 Power, energy and the relationship with voltage and current.  Power is how fast energy is being converted to another form. i.e. Electricity to heat (toaster) or Electricity to sound (speaker).  Power = Energy / Time  Energy = Power x Time

 As we know electricity is made up of two main parts current and voltage.  We get our Power from current and Voltage so:  Power = Voltage x Current, (P = VI)  Energy = Voltage x Current x time (E = VIt) 

 Most appliances have a power rating listed somewhere on them. Usually given in Watts.  A Microwave might use Watts, a Toaster 1800 Watts.  If the AC Supply is 240v and Toaster uses 1800 Watts  1. What is the current the toaster draws?  2. What is the resistance of the toaster in use?

 Harry is charging his phone at home. (assume 240v rms)  It draws a current of 1.5 Amps  How much power does it draw?  If left charging for four hours, how much energy has he used in; i) kWh? ii) Joules?

 Storage cells are special types of cells that current can be reversed through them.  This reverses the process that produces the charge, meaning you can recharge the battery  List some common types.