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DESIRE LEARNING OBJECTIVESTO KNOW ABOUTELECTRIC CIRCUIT

DIRECT CURRENT

ALTERNATING CURRENT

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 A combination of electrical components that form a conducting path is called

an electric circuit.

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DIRECT CURRENTDIRECT CURRENT

Such a current that does not change itsdirection is known as direct current It isdenoted !" DC# which is o!tained $ro%&ri%ar" and secondar" ce''s

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ALTERNATING

CURRENTSuch a current that re(erses its direction with

a constant $re)uenc" $ro% &ositi(es tonegati(e and negati(e to &ositi(e direction isknown as a'ternating current It is o!tained !"generators It is denoted !" AC

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WIRE

 To carr" e'ectron *ow without resistance in aconductor is acco%&'ished through wireSing'e core wire is co%%on'" insu'ated I$%ore than one wire is enc'osed together in asing'e insu'ation# it is ca''ed ca!'e

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TRANSFORMER The trans$or%er is used to trans$or%

e'ectrica' energ" at one (o'tage intoe'ectrica' energ" at another (o'tage Thetrans$or%ation o$ (o'tage is ter%ed asste&&ing u& or ste&&ing down o$ (o'tage

+hen there is an a'ternating current in onecoi' The (ar"ing %agnetic *u, induces ana'ternating (o'tage in the second coi' !"neutra' indication

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CAPACITORS 

It is a de(ice which stores e'ectrica' energ" in

the sha&e o$ e'ectrostatic -e'd

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MOTORIt is used to change the e'ectrica' energ" into%echanica' energ"

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DC MOTORA direct current %otor is a rotating %achine

which trans$or%s direct current e'ectrica'energ" into %echanica' energ"

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DC %otor characteristics 

.Series /otor

0Shunt /otor1Co%&ound /otor

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RECTIFIER 

 The &rocess o$ con(erting an AC into a DC

su&&'" is known as recti-cation The de(icewhich con(erts AC su&&'" is known as recti-er

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GENERATORS 

An" %achine which con(erts %echanica'

energ" into e'ectrica' energ" is known as agenerator

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ELECTRICAL SAFETY Before starting te !or" o#erator

$%st &e&" a'' e'e&tri&a' 'ea(s an(

#oints for ser)i&ea*i'it+ an( an+a*nor$a'it+

  Ce&" te re,%isite e'e&tri&a' s%##'+

for te $a&ine 

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ELECTRICAL CIRC2IT