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CANKAYA UNIVERSITY OFFICE OF BASIC AND ELECTIVE COURSES -ENGLISH UNIT-

CANKAYA UNIVERSITY OFFICE OF BASIC AND ELECTIVE COURSES -ENGLISH UNIT-. VOCABULARY PRESENTATION FOR ENG 205 COURSE WEEK 11. Supply (n): a source of electrical energy In Turkey , electrical supply is provided by some organisations such as EnerjiSA , Başkent Elektrik etc .

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CANKAYA UNIVERSITY OFFICE OF BASIC AND ELECTIVE COURSES -ENGLISH UNIT-

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  1. CANKAYA UNIVERSITY OFFICE OF BASIC AND ELECTIVE COURSES-ENGLISH UNIT- VOCABULARY PRESENTATION FOR ENG 205 COURSE WEEK 11

  2. Supply (n): a source of electrical energy InTurkey, electricalsupply is providedbysomeorganisationssuch as EnerjiSA, Başkent Elektrik etc. • Current(n): theflow of electricitythrough a wire, etc A 15 ampelectricalcurrent

  3. alternate (v):  to happen or exist one after the other repeatedly Her musicalternatesmoments of suddenquietwithmoments of dramaticintensity. Alternatingcurrent (n. Phr): an electriccurrentthatchangesitsdirectionregularly. Theelecricitysuppliedtohomes is alternatingcurrent.

  4. Direct current (n.phr): electrical current which moves in one direction only • Batteries are a source of direct current • frequency(n): The number of repetitions per unit time of a complete waveform • Inthe UK, AC supplyalternates 50 timespersecond, soitsfrequency is 50 hertz.

  5. Singlephase current(n):thecurrentwhichformsone sine wave. Thecurrentsuppliedtohomes is singlephase.

  6. Three-phase current(n):threecurrentshavingdifferenttiming • Infactoriesandlargebuildings, threephasecurrent is needed as theyhavepowerfulelectricalequipment

  7. generate(v): toproducesth Windturbinesgenerateelectricityforthelocalcommunity. • generator(n): a machineforproducingelectricity Theschool’sgeneratorsareusedduring a powercut.

  8. Transform(v): tochangethe form of sth Thephotochemicalreactionstransformthelightintoelectricalimpulses. Transformer(n): a device which changesthe voltage or other characteristic of electrical energy as it moves from one circuit to another You may need a transformer if you want to run a personal stereo off alternatingcurrent.

  9. Step up(phr.v): to increase the size, amount or speed of a process Ifwewanttogrow as a factory, weeneedto step uptheproduction. • Step down(phr.v): toreducethe amount, supply or rate of something • The doctor has said that I can start stepping down my medication in a few days' time.

  10. inverter(n): a device whichconvertsDC toAC • induction(n): the process by which electrical or magnetic properties are transferred, without physical contact, from one circuit or body to another

  11. Readthetexts on page 13 andanwerthequestions • What is a sine wave? • Whythreephasecurrentshould be used in factories? • What is thefuction of distributionlines? • What is Photovaoltaiccells?Howtheenergy is produced? • WhytheelectrictyproducedbyPVscannot be used at home?

  12. Answers • Thewave of AC supplythatwesee/use on a graph • Thosebuildingshavepowerfulelectricalequipmenrtand it provides a smoothersupply as it reducesthegapsbetweenthevoltagepeaks • Itsupplieselectricitytostreetsandhouses • PVsare solar cells, electriciy is producedfromsunlight. • BecausePVsgenreatedirectcurrent, andto be used at home DC should be invertedinto AC

  13. Do theexercises on yourstudypack

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