Electric Circuits & Application Of Electrical Energy
Electric Circuits & Application of Electrical EnergyTechnologyBelén Gallego
Electric Circuits & Application of Electrical Energy1.- Work in groups of three or four. Look at these pictures and discuss:BreadAlarm clockCd-cassetteplayerToothbrushMp3ConsoleDVD D playerHairdryer which of these objects do you use every day? Write down the names. which of them need electricity to work? why is electricity important in our lives?TechnologyBelén Gallego
Electric Circuits & Application of Electrical Energy2.- Look at the picture. Make 5 sentences that explain the behaviour ofthe particles of the atom.Electronsmovedon’t moveProtonsNeutronsarearen’taround thenucleustogether inthe3.- Complete these sentences with the most suitable word. Work in pairs.-(electrons/protons) have negative charge and protonshave (positive/negative) charge.A (stable/charged) atom has the same number ofelectrons and protons.If an atom has a higher number of electrons than of protons it is(positively/negatively) charged.If an atom has a lower number of electrons than of protons it is(positively/negatively) charged.If an atom is stable it (has/does not have) charge.TechnologyBelén Gallego
Electric Circuits & Application of Electrical Energy4.- Look at this picture. Where do you think there are more electrons?Conductor Material----------------------------Positively Charged MaterialNegatively ChargedMaterialNow try to imagine what will happen. Choose the sentence you think istrue. Electrons will move from negatively charged material to positivelycharged materialNothing.Electrons will move from positively charged material to negativelycharged material.5.- Now you know what electricity is. Write the definition.Your classmate has half of the words you need to complete the definition.Electricity Words: a, flow, electrons, in(Words of the other student: is, substance, a, of)TechnologyBelén Gallego
Electric Circuits & Application of Electrical Energy6.- Is it true? Is it false? Put aTrueFalseElectrons move around the nucleusA negatively charged atom has positive chargeA positively charged atom has more electrons than protonsStable atoms have the same number of electrons andprotonsAtoms are made of moleculesElectrons move from negatively charged material topositively charged materialCorrect the false sentence. Write down the correction.TechnologyBelén Gallego
Electric Circuits & Application of Electrical Energy7.- Look at the picture of the exercise 1.Which of those electric devices need to be plugged inWhich of them need a cellto work?to work?or a batteryTo be plugged inCell/Battery8.- What is the way of electricity?Look at the picture.Power ElectricStationTelevisionTechnologyElectric gridPlugBelén Gallego
Electric Circuits & Application of Electrical EnergyNow, work in pairs. Put the following sentences in order.a. Plugs are connected to an electric gridb. An electric grid carries the electricity produced in Power Electricstations.c. Electricity is produced in Power Electric Stations.d. Televisions must be plugged in to worke. Televisions need electricity to work.Write the sentences in the correct order.9.-Do you know who invented the first bulb? Read the text below.Thomas Alva Edison was born in Ohio (United States) in 1847. Heworked in business but he was also an inventor. He enjoyed doingexperiments with electricity. In 1879 he invented the bulb. He used acarbonized bamboo filament. That bulb worked for 48 hours. He died in1931.Where andwhen was heborn?What was his What did hejob?invent?Whichmaterials didhe use?Thomas AlvaEdison andhis bulbTechnologyBelén Gallego
Electric Circuits & Application of Electrical Energy1.- Look at these pictures. -What do these circuits have in common? Discuss in pairs and choose themost suitable sentence. These circuits are all open.These circuits are all closed. There are some elements running in the circuit (e.g: water,electrons).There are no elements running in the circuit. The circuit is interrupted.The circuit is not interruptedNow, write the sentences you have chosen.TechnologyBelén Gallego
Electric Circuits & Application of Electrical Energy2.- Which elements from both pictures do you think have the samefunction?Match pairs.3.- Below are parts of the definition of an electric circuit. Can you putthem in the correct order?Anof electrons.elements is a group ofto give wayinter-connected4.- Discuss with your partner and answer:Which of the electric elements of exercise 2 do you think give electronsenergy to move?Which of the electric elements above do you think allows electrons totravel through it?Which of the electric elements above do you think transform electricalenergy into another kind of energy?TechnologyBelén Gallego
Electric Circuits & Application of Electrical Energy We will do some experiments with electric circuits. We will start withthe simplest.Before you start, you need to know:1) Scientists and electricians draw electric circuits using internationalspecial symbols.2) Electric circuit diagram: is a schematic drawing that represents anelectric circuit. For example:3) Basic elements:Electric elén Gallego
Electric Circuits & Application of Electrical EnergyEXPERIMENT 1Material: Picture1 cell 1,5 Vwires1 bulb 1,5 V What’s happened?The bulbdoes not-light up.lights up.-Electric diagramYou must change the picture for thesymbol.EXPERIMENT 2PictureMaterial: 1 cell 1,5 Vwires1 bulb 1,5 V What’s happened?The bulbTechnologydoes not-light up.lights up.-Electric diagramYou must change the picture for thesymbol.Belén Gallego
Electric Circuits & Application of Electrical EnergyConclusions:the firstif Iexperimentconnectthe secondthe wire inexperimentInthe hts up.doesn’tlight up.Write the correct sentence for every experiment.EXPERIMENT 3PictureMaterial: 1 cell 1,5 Vwires1 bulb 1,5 VMaterials: paper, nail, rubber,pen.Material -What’s happened? Put aIt lights upTechnologyIt does notlight upBelén Gallego
Electric Circuits & Application of Electrical EnergyConclusions:paperWhen I connectthe wires witha rubberdoesn’tlights up-light up.the bulba naila penWrite the sentences for every experiment.TechnologyBelén Gallego
Electric Circuits & Application of Electrical Energy1.- Remember the results of experiments in lesson 2. Complete the chart.Materials that make a bulblight upMaterials that do not makea bulb light up2.- Re-order the letters of these words and complete the next sentences.RDONUCTOC -NAULTISRO is a material that allows electrons to pass throughit.is a material that does not allow electrons to passthrough it.3.- Draw arrows (case.) to show the direction of electrons in everyReal way -Direct CurrentTechnologyConventional way -Alternating CurrentBelén Gallego
Electric Circuits & Application of Electrical Energy - -4.- Look at these pictures.TorchLampMixerOil lampVacuumCleanerBrushHand MixerWhiskAnswer the questions below:-Which of these devices have the same function?-Which of these devices have an electric circuit?TechnologyBelén Gallego
Electric Circuits & Application of Electrical Energy-Is there an element to switch on and switch off the electric devices?5.- Electric Crossword.123456789ACROSSDOWN2. It allows us to open or close anelectric circuit3. Direction of electric current isconstant4. Material that does not allowelectrons to pass through it.5. Name of electron's path fromnegative terminal to positiveterminal7. Plastic outside, copper inside8. Material that allows electronsto pass through it.9. It transforms electrical energyin another kind of energy that weneed.1. Direction of electric current isnot constant2. Name of electron's path frompositive terminal to negativeterminal6. It gives electrons energy toflow through a circuitTechnologyBelén Gallego
Electric Circuits & Application of Electrical yBelén Gallego
Electric Circuits & Application of Electrical EnergyOne-way switchPush switch NOPush switch NCTwo/way switchDouble-Pole switch6.- Complete the chart below.TechnologyBelén Gallego
Electric Circuits & Application of Electrical bolEnergy TransformationDC. Mechanical-ElectricalAC. Mechanical-ElectricalElectrical- SoundBulbEngine7.- Match the names with the right symbol.TechnologyBelén Gallego
Electric Circuits & Application of Electrical EnergyBatteryPush switch NCTwo-way switchDouble pole switchAccumulatorPush switch NO8.- Put the names of the components of this wire:TechnologyBelén Gallego
Electric Circuits & Application of Electrical Energy1.- In order to revise what we did in the previous lesson we will play agame. You will have some cards (pictures, names or symbols).Everyone must complete one column (you must put the card in thecorresponding place).Ask your classmates for the cards you need to complete the column.The questions can be, for example:Do you have the bulb picture?orDo you have the bulb name?orDo you have the bulb symbol? The answers can be:No, I don’torYes, I do. Here it is!orYes, I do. Take it! The first person who completes the column wins the game.EXAMPLE:PictureNameSymbolBulbTechnologyBelén Gallego
Electric Circuits & Application of Electrical EnergyEXPERIMENT 1Material: Picture1 cell 1,5 Vwires1 buzzer1 push switch NO -What’s happened?Underline the most suitable word in these sentences:When the push switch is in the OFF positionopen/closed. Electricity flows/does not flow.the circuit isWhen the push switch is in the ON positionopen/closed. Electricity flows/does not flow.the circuit isWhen the push switch is in the OFF position the buzzer rings/does notring.When the push switch is in the ON position the buzzer rings/does notring.TechnologyBelén Gallego
Electric Circuits & Application of Electrical EnergyCircuit DiagramDraw the diagram of the circuit.EXPERIMENT 2Material: Picture1 cell 4,5 Vwires1 buzzer1 bulb 1,5 V1 one-way switch -What’s happened?Complete these sentences:When the one-way switch is in the OFFand the bulb .position the buzzerWhen the one-way switch is in the ON position the buzzerand the bulb .TechnologyBelén Gallego
Electric Circuits & Application of Electrical EnergyCircuit DiagramDraw the diagram of the circuitEXPERIMENT 3Material: Picture1 cell 1,5 Vwires1 buzzer1 bulb 1,5 V1 two-way switch -What’s happened?Complete these sentences:When the two-way switch is in the OFF positionbuzzer and the bulb .theWhen the two-way switch is in the ON position the buzzerand the bulb .Why do you think this happens?Because when the two-way switch is in the position it is connectedwith and is not connected withTechnologyBelén Gallego
Electric Circuits & Application of Electrical EnergyCircuit DiagramDraw the diagram of the circuit.EXPERIMENT 4Material: Picture1 cell 1,5 Vwires1 bulb 1,5 V2 two-way switch -What’s happened?Complete these sentences:When both two-way switch 1 and switch 2 are in the OFF positionthe bulb .When both two-way switch 1 and switch 2 are in the ON positionthe bulb .When switch 1 is in OFF and switch 2 is ON the bulb.When switch 1 is On and switch 2 is OFF the bulb.TechnologyBelén Gallego
Electric Circuits & Application of Electrical EnergyCircuit DiagramDraw the diagram of the circuit.TechnologyBelén Gallego
Electric Circuits & Application of Electrical EnergyTechnologyBelén Gallego
Electric Circuits & Application of Electrical Energy1.- What are they? Label the electric components (generator, receiver,conductor or controller) and what type it is (cell, motor, )Espurnes, fils i bombetes. El motorelèctric. Ed McGrawhill.Match the electric components with the types and their function:Electric ologyTypeFunctionelements thattransform electricalenergy in another kindof energy that we needtransports electronsfrom generator toreceiver and fromreceiver to generatorallows to open or closean electric circuitgives electrons energyto flow through acircuitBelén Gallego
Electric Circuits & Application of Electrical Energy2.- Look at these pictures:Discuss with your partner the following questions. You can answer using:I think that becauseIn my opinion becauseFrom my point of view because In which picture do you think cars are faster? Why do you think so? Where do you think more cars pass in one minute?TechnologyBelén Gallego
Electric Circuits & Application of Electrical Energy Look at the picture on the left, do you think cars would go faster ifthe road was broader ( ) or narrower ()?Now imagine an electric circuit and relate electric components to themain components of the pictures: CarsGeneratorEngineWiresRoadsElectronsMake a similar sentence to the first one using the words in brackets:-The more powerful an engine is the more energy the car has.-The more powerful a is the more energy thehas .(electron, generator)-Traffic current is the number of cars that pass on a roadevery second.-current is the number of that pass throughan electric circuit every second. (electrical, electrons)-The broader a road is the faster cars go.-The broader a is the faster go. (electrons,wire)TechnologyBelén Gallego
Electric Circuits & Application of Electrical Energy-The narrower a road is the slower cars go.-The narrower a is the slower go. (electrons,cable).3.- Fill the gaps with the words given:Voltage, Current, Resistance is the number of electrons that pass through an electriccircuit every second. The opposition that some materials offer to the movement ofelectrical current is called . is the energy given to electrons to pass through acircuit.4.- Complete this chart.MagnitudeUnitSymbolVoltageAmpereΩ5.- Work in pairs. Underline what you think is the most suitable word: The thicker and shorter a wire is the more/less resistance it has. The thinner and longer a wire is the more/less resistance it has.TechnologyBelén Gallego
Electric Circuits & Application of Electrical Energy6.- Work in pairs. Put the wires in order from lower to higher:LowerresistanceHigherresistance453127.- Discuss this dilemma with a classmate:You have two wires. The first one is 1 mm wide and the second one 5 mmwide. You have a mixer that spends 15 A and a lamp that spends 3 A.Which wire would you use in each case?I would use the 1 mmwidewire5 mmwidewirethemixerwithTechnologythelampbecausethis wireismorethinnersothickerlesselectrons canpass throughit.Belén Gallego
Electric Circuits & Application of Electrical EnergyNow, you have two more wires. The first one is 2,5 mm wide and the secondone 4,5 mm wide. You have the same mixer and the lamp as in the exampleabove.Which wire would you use in each case?Write the sentences:TechnologyBelén Gallego
Electric Circuits & Application of Electrical Energy1.- Do you know who Alessandro Volta, André-Marie Ampère and GeorgeSimon Ohm were? You have some information of one of them.Ask your classmates for the missing information. You can use the questionsin the chart.AlessandroVoltaWhere washe born?When was heborn?When did hedie?What was his Whatjob?electricalmagnitudedid hediscover?Whatelectricalunit is namedafter hissurname?Birth: 18thFebruary of1745 in ComoDeath: 5thMarch of1827Physicist andteacherVolt (V)Where washe born?When was heborn?When did hedie?What was his Whatjob?electricalmagnitudedid hediscover?VoltageWhatelectricalunit is namedafter hissurname?André-MarieAmpèreTechnologyBelén Gallego
Electric Circuits & Application of Electrical EnergyWhere washe born?When was hebornWhen did hedie?What was his Whatjob?electricalmagnitudedid hediscover?Whatelectricalunit is namedafter hissurname?George SimonOhmEXPERIMENT 1Material: Look at the diagram.Identify what components arethere?. Write them down below.Circuit DiagramEspurnes, fils i bombetes. El motorelèctric. Ed McGrawhill.What’s happened?If I connect the components as shown in the diagram, the bulb.If I change the position of only one of the switches, the bulb .TechnologyBelén Gallego
Electric Circuits & Application of Electrical EnergyEXPERIMENT 2Material: Look at the diagram.Identify what componentsthere are. Write them downbelow.Circuit DiagramEspurnes, fils i bombetes. El motorelèctric. Ed McGrawhill.What’s happened?If I connect the components as shown in the diagram, the engine spins tothe (left/right).If I change the position of the switch, the engine spins to the(left/right).Why do you think this happens?Because the engine .TechnologyBelén Gallego
Electric Circuits & Application of Electrical EnergyDeviceSymbolConnectionVoltmeter: it measuresvoltage across acomponent in a circuit.In parallelAmmeter: it measures thecurrent flowing through acomponent in a circuit.In seriesOhmmeter: it measuresthe resistance of aresistor.In parallel andwithout voltage.Multimeter: it measuresvoltage, current andresistance just as othermagnitudesIt depends on themagnitude measured.It depends on themagnitude measured.EXPERIMENT 3Material: Multimeter1 bulb 1,5 V1 cell 1,5 Vwires1 one-way switchTechnologyCircuit Diagram -Belén Gallego
Electric Circuits & Application of Electrical EnergyProcedure1.- Select DC or AC2.- Select VOLTAGE and the rightscale3.- Connect the black wire in theTo select aCOM connection (as in the picture)magnitude4.- Connect the red wire in the Ω-Vand scaleconnection (behind COM)To connect5.- Put the ON position of thethe red wireTo connectmultimeterthe black6.- Connect the wires in parallel aswirein the picture. Notice the red wireis connected in the positive sideand the black one in the negativeside.Read the meter, how many volts does the multimeter show?To select DCor ACIs it approximately the same voltage as the cell?Circuit DiagramDraw the diagram.TechnologyBelén Gallego
Electric Circuits & Application of Electrical EnergyEXPERIMENT 4Material: Electric Circuit DiagramMultimeter1 bulb 1,5 V1 cell 1,5 Vwires1 one-way switch -1.- Select DC or AC2.- Select CURRENT and the rightscale3.- Connect the black wire in theTo select aCOM connection (as in the picture)magnitude4.- Connect the red wire in the mAand scaleor A, the most suitableTo connect5.- Put the ON position of thethe red wireTo connectmultimeterthe black6.- Connect the wires in series aswirein the picture. Notice the red wireis connected in the positive sideand the black one in the negativeside.Read the meter, how many amperes does the multimeter show?To select DCor ACCircuit DiagramDraw the diagram.TechnologyBelén Gallego
Electric Circuits & Application of Electrical Energy1.- Do you know who Alessandro Volta, André-Marie Ampère and GeorgeSimon Ohm were? You have some information of one of them.Ask your classmates if they have the information you do not have. You mustask them the same questions you have in the chart.Where washe born?When was heborn?When did hedie?What was his Whatjob?electricalmagnitudedid hediscover?Whatelectricalunit is namedafter hissurname?Where washe born?When was heborn?When did hedie?Birth: 20thJanuary1775 in LyonDeath: 10thJune 1836What was his Whatjob?electricalmagnitudedid hediscover?Whatelectricalunit is namedafter hissurname?Physicist andteacherAmpere rentBelén Gallego
Electric Circuits & Application of Electrical EnergyWhere washe born?When was heborn?When did hedie?Which washis job?Whatelectricalmagnitudedid hediscover?Whatelectricalunit is namedafter hissurname?George SimonOhmEXPERIMENT 1Material: Look at the diagram.Identify what components arethere?. Write them down below.Circuit DiagramEspurnes, fils i bombetes. El motorelèctric. Ed McGrawhill.What’s happened?If I connect the components as shown in the diagram, the bulb.If I change the position of only one of the switches, the bulb .TechnologyBelén Gallego
Electric Circuits & Application of Electrical EnergyEXPERIMENT 2Material: Look at the diagram.Identify what componentsthere are. Write them downbelow.Circuit DiagramEspurnes, fils i bombetes. El motorelèctric. Ed McGrawhill.What’s happened?If I connect the components as shown in the diagram, the engine spins tothe (left/right).If I change the position of the switch, the engine spins to the(left/right).Why do you think this happens?Because the engine .TechnologyBelén Gallego
Electric Circuits & Application of Electrical EnergyDeviceSymbolConnectionVoltmeter: it measuresvoltage across acomponent in a circuit.In parallelAmmeter: it measures thecurrent flowing through acomponent in a circuit.In seriesOhmmeter: it measuresthe resistance of aresistor.In parallel andwithout voltage.Multimeter: it measuresvoltage, current andresistance just as othermagnitudesIt depends on themagnitude measured.It depends on themagnitude measured.EXPERIMENT 3Material: Multimeter1 bulb 1,5 V1 cell 1,5 Vwires1 one-way switchTechnologyCircuit Diagram -Belén Gallego
Electric Circuits & Application of Electrical EnergyProcedure1.- Select DC or AC2.- Select VOLTAGE and the rightscale3.- Connect the black wire in theTo select aCOM connection (as in the picture)magnitude4.- Connect the red wire in the Ω-Vand scaleconnection (behind COM)To connect5.- Put the ON position of thethe red wireTo connectmultimeterthe black6.- Connect the wires in parallel aswirein the picture. Notice the red wireis connected in the positive sideand the black one in the negativeside.Read the meter, how many volts does the multimeter show?To select DCor ACIs it approximately the same voltage as the cell?Circuit DiagramDraw the diagram.TechnologyBelén Gallego
Electric Circuits & Application of Electrical EnergyEXPERIMENT 4Material: Electric Circuit DiagramMultimeter1 bulb 1,5 V1 cell 1,5 Vwires1 one-way switch -1.- Select DC or AC2.- Select CURRENT and the rightscale3.- Connect the black wire in theTo select aCOM connection (as in the picture)magnitude4.- Connect the red wire in the mAand scaleor A, the most suitableTo connect5.- Put the ON position of thethe red wireTo connectmultimeterthe black6.- Connect the wires in series aswirein the picture. Notice the red wireis connected in the positive sideand the black one in the negativeside.Read the meter, how many amperes does the multimeter show?To select DCor ACCircuit DiagramDraw the diagram.TechnologyBelén Gallego
Electric Circuits & Application of Electrical Energy1.- Do you know who Alessandro Volta, André-Marie Ampère and GeorgeSimon Ohm were? You have some information of one of them.Fill in the missing information by asking your classmates. You can use thequestions provided in the chartWhere washe born?When was heborn?When did hedie?What was his Whatjob?electricalmagnitudedid hediscover?Whatelectricalunit is namedafter hissurname?Where washe born?When was heborn?When did hedie?What was his Whatjob?electricalmagnitudedid hediscover?Whatelectricalunit is namedafter ologyBelén Gallego
Electric Circuits & Application of Electrical EnergyGeorge SimonOhmWhere washe born?When was heborn?When did hedie?What was his Whatjob?electricalmagnitudedid hediscover?Whatelectricalunit is namedafter hissurname?Birth: 16thMarch 1789in ErlangenDeath: 6thJuly 1854Teacher andPhysicistOhm (Ω)EXPERIMENT 1Material: Look at the diagram.Identify what components arethere?. Write them down below.ResistanceCircuit DiagramEspurnes, fils i bombetes. El motorelèctric. Ed McGrawhill.What’s happened?If I connect the components as shown in the diagram, the bulb.If I change the position of only one of the switches, the bulb .TechnologyBelén Gallego
Electric Circuits & Application of Electrical EnergyEXPERIMENT 2Material: Look at the diagram.Identify what componentsthere are. Write them downbelow.Circuit DiagramEspurnes, fils i bombetes. El motorelèctric. Ed McGrawhill.What’s happened?If I connect the components as shown in the diagram, the engine spins tothe (left/right).If I change the position of the switch, the engine spins to the(left/right).Why do you think this happens?Because the engine .TechnologyBelén Gallego
Electric Circuits & Application of Electrical EnergyDeviceSymbolConnectionVoltmeter: it measuresvoltage across acomponent in a circuit.In parallelAmmeter: it measures thecurrent flowing through acomponent in a circuit.In seriesOhmmeter: it measuresthe resistance of aresistor.In parallel andwithout voltage.Multimeter: it measuresvoltage, current andresistance just as othermagnitudesIt depends on themagnitude measured.It depends on themagnitude measured.EXPERIMENT 3Material: Multimeter1 bulb 1,5 V1 cell 1,5 Vwires1 one-way switchTechnologyCircuit Diagram -Belén Gallego
Electric Circuits & Application of Electrical EnergyProcedure1.- Select DC or AC2.- Select VOLTAGE and the rightscale3.- Connect the black wire in theTo select aCOM connection (as in the picture)magnitude4.- Connect the red wire in the Ω-Vand scaleconnection (behind COM)To connect5.- Put the ON position of thethe red wireTo connectmultimeterthe black6.- Connect the wires in parallel aswirein the picture. Notice the red wireis connected in the positive sideand the black one in the negativeside.Read the meter, how many volts does the multimeter show?To select DCor ACIs it approximately the same voltage as the cell?Circuit DiagramDraw the diagram.TechnologyBelén Gallego
Electric Circuits & Application of Electrical EnergyEXPERIMENT 4Material: Electric Circuit DiagramMultimeter1 bulb 1,5 V1 cell 1,5 Vwires1 one-way switch -1.- Select DC or AC2.- Select CURRENT and the rightscale3.- Connect the black wire in theTo select aCOM connection (as in the picture)magnitude4.- Connect the red wire in the mAand scaleor A, the most suitableTo connect5.- Put the ON position of thethe red wireTo connectmultimeterthe black6.- Connect the wires in series aswirein the picture. Notice the red wireis connected in the positive sideand the black one in the negativeside.Read the meter, how many amperes does the multimeter show?To select DCor ACCircuit DiagramDraw the diagram.TechnologyBelén Gallego
Electric Circuits & Application of Electrical EnergyIn an electric circuit VOLTAGE, CURRENT and RESISTANCE are closelyrelated with each other.This relationship is known as OHM’S LAW:Voltage Current x ResistanceYou need a new lamp for your bicycle so you buyone. The filament of the bulb has a 4 Ω resistanceand it takes a current of 0,8 A. The shop assistantdid not give you a battery so now you must buy one.What voltage should the battery have?Solve this problem with the help of this triangle.VoltageCurrent x ResistanceResistance 4 ΩCurrent 0,8 AVoltage ?(Cover with your finger the magnitudeyou are looking for. Operation: multiplication)V 0,8 A x 4 ΩV 3,2 volts (V)you must buy a 3,2 v battery.AnswerTechnologyBelén Gallego
Electric Circuits & Application of Electrical Energy1.- What operation must you do in every case?If I do not know the current I must (multiply / divide)(voltage /current /resistance) by (voltage / current /resistance)the voltage I must (multiply / divide)(voltage /current /resistance) by (voltage / current /resistance)the resistance I must (multiply / divide)(voltage /current /resistance) by(voltage / current / resistance)Now practise this new concept:2.- The circuit of a little torchhas 3 Ω of resistance. It has a4,5 v battery. What is the current through the circuit?Voltage VoltageResistance Current Current x ResistanceOperations:Answer TechnologyBelén Gallego
Electric Circuits & Application of Electrical Energy3.- A friend of yours has given you a lampthat has 625 Ω and thecurrent flowing through it is 0,2 A. What is the voltage?Voltage VoltageResistance Current Current x ResistanceOperations:Answer 4.- Your stereo playerneeds four 4,5 v batteries to work and ittakes a current of 2 A . What is the resistance of the circuit?Voltage VoltageResistance Current Current x ResistanceOperations:Answer TechnologyBelén Gallego
Electric Circuits & Application of Electrical Energy5.- The battery of your mobileis 3,7 v and has a 5 Ω resistance.What is the current through the battery if the switch is open?Voltage Resistance VoltageCurrent Current x ResistanceOperations:Answer 6.- Do you remember this picture? Work in pairs and answer the questionsbelow. How can you increase the current (number of cars per minute)without modifying the engine of the cars? Choose the most suitableanswer:-Technologymaking the road broadermaking the road narrowerBelén Gallego
Electric Circuits & Application of Electrical EnergySo, in the case of an electric circuit we must: use a (thicker/thinner) wire.(increase/decrease) the resistance.How can you decrease the current without modifying the engine ofthe cars? Choose the most suitable answer:-making the road broadermaking the road narrowerSo, in the case of an electric circuit we must: use a (thicker/thinner) wire.(increase/decrease) the resistance.How can you increase the current without modifying the size of theroad?-making an engine that gives more energymaking an engine that gives less energySo, in the case of an electric circuit we must: use a generator with (higher/lower) voltage(increase/decrease) the voltage.How can you decrease the current without modifying size of theroad?- making an engine that gives more energy- making an engine that gives less energySo, in the case of an electric circuit we must:-Technologyuse a generator with (higher/lower) voltage(incr
Electric Circuits & Application of Electrical Energy Technology Belén Gallego 1.- Look at these pictures. What do these circuits have in common? Discuss in pairs and choose the most suitable sentence. These circuits are all open. These circuits are all closed. There are some elements running in the circuit (e.g: water, electrons).
Contemporary Electric Circuits, 2nd ed., Prentice-Hall, 2008 Class Notes Ch. 9 Page 1 Strangeway, Petersen, Gassert, and Lokken CHAPTER 9 Series–Parallel Analysis of AC Circuits Chapter Outline 9.1 AC Series Circuits 9.2 AC Parallel Circuits 9.3 AC Series–Parallel Circuits 9.4 Analysis of Multiple-Source AC Circuits Using Superposition 9.1 AC SERIES CIRCUITS
144 SECTION II Basic Electric Circuits Objectives After studying this unit, you should be able to discuss the properties of series circuits. list three rules for solving electrical values of series circuits. calculate values of voltage, current, resistance, and power for series circuits. calculate the values of voltage drop in a series circuit using the voltage
/ Voltage Divider Circuits Voltage Divider Circuits AC Electric Circuits Question 1 Don’t just sit there! Build something!! Learning to mathematically analyze circuits requires much study and practice. Typically, students practice by working through lots of samp
6. Exploring Electrical Circuits A lesson to provide opportunities to simulate electrical circuits. Providing a hands-on shared investigation of the creation of electrical circuits. Students apply their understanding of electrical circuits. STEM Design Challenge: Circuit Design Design a board game that incorporates an electrical circuit. 7.
1 Introduction to RL and RC Circuits Objective In this exercise, the DC steady state response of simple RL and RC circuits is examined. The transient behavior of RC circuits is also tested. Theory Overview The DC steady state response of RL and RC circuits are essential opposite of each other: that is, once steady state is reached, capacitors behave as open circuits while inductors behave as .
1.1 From electric to electronic This third volume of the book series Lessons In Electric Circuits makes a departure from the former two in that the transition between electric circuits and electronic circuits is formally crossed. Electric circuits are connections of conductive wires and other devices whereby the uniform flow of electrons occurs.
Fundamentals of Electric Circuits iFth dition Alexander Sadiku With its objective to present circuit analysis in a manner that is clearer, more interesting, and easier to understand than other texts, Fundamentals of Electric Circuits by Charles Alexander and Matthew Sadiku has become the student choice for introductory electric circuits courses.
« On attend par additif alimentaire : toute substance habituellement non consommée comme aliment en soi et habituellement non utilisée comme ingrédient caractéristique dans l’alimentation, possédant ou non une valeur nutritive, et dont l’adjonction intentionnelle aux denrées alimentaires, dans un but technologique au stade de leur fabrication, transformation, préparation .
