experiment3_kcl & kvl
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8/12/2019 Experiment3_kcl & Kvl
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ASCT/EEE/LAB/BEE-03
(Kirch-hoffs Current & Voltage La!
EXPERIMENT NO. - 03
AIM: Verification of Kirch-hoffs Crrent !a" #KC!$ % Kirch-hoffs Vo&ta'e !a"
#KV!$.
IN(TR)MENT( RE*)IRE+:S. No. Name Range Qty
1. "egulate# $oer su$$l% 0 -30V
' "heostat )00 oh*+ a*$
3 "heostat ,) oh*+ ) a*$
, "heostat ) oh*+) a*$ '
) A**eter 0- a*$ '
A**eter 0-' a*$
. Volt*eter 0-)0V
Volt*eter 0-30V
T,EOR:Kirch-hoffs Current Law (KCL):
Kirch-hoffs current law states that the algebraic sum of the all branch
current leaving a node is zero at all instants of time.
This la is a conseuence of conser1ation of charge2 hich enters the no#e2
*ust lea1e the no#e since it cannot e store# there Since the algeraic su* of the
charge is 4ero So its ti*e #eri1ati1e shoul# also e 4ero
A node in a network is the point at which more than two branches are meeting
together.
5athe*aticall%2
I/I 1 I3/I2
Kirch-hoffs o!tage Law (KL):
Kirch-hoffs voltage law state that the algebraic sum of the all branch voltage
around any closed lop a network is zero at all instants of time.
This la is a conseuence of the la of conser1ation of energ%2 1oltage eingthe energ% $er unit charge An increase in energ% hile going fro* one ranch to
another is ter*e# as a 1oltage rise hile a #ecrease in energ% is ter*e# as a 1oltage
#ro$
Alternatel%2 the Kirch-hoffs 1oltage la *a% e e6$resse# in ter*s of #ro$ &
rise of 1oltage as7Around any closed loop at any instant of time, the sum of voltage
drop must be equal to the sum of voltage rise.
5athe*aticall%2
e..f. / IR 1 0
V 1 IR/ IR3V1 V/ V3
8age of 3
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8/12/2019 Experiment3_kcl & Kvl
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ASCT/EEE/LAB/BEE-03
(Kirch-hoffs Current & Voltage La!
CIRC)IT +IA4RAM:
PROCE+)RE:": Kirch-hoffs Current Law:
Connect the circuit as $er the fig
' A#9ust the $osition of all the rheostats in the circuits so that each of these offers
*a6i*u* resistance in the eginning
3 Sitch on the #c su$$l%
, :ote #on the rea#ings of all the a**eters in the circuit
) Change the 1alue of resistances in the ranches to get #ifferent set of rea#ings
;hile ta
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8/12/2019 Experiment3_kcl & Kvl
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ASCT/EEE/LAB/BEE-03
(Kirch-hoffs Current & Voltage La!
O5(ERVATION TA5!E:
": Kirch-hoffs Current Law:
S. No. "$$!ie% &o!tage ' '1 ' '1 '
'
#: Kirch-hoffs o!tage Law:
S. No. "$$!ie% &o!tage 1 1
'
RE()!T: Since the current entering the netor< = is eual to the su**ation of the
current lea1ing the netor< ie => ='2 therefore the Kirch-hoffs Current La
is 1erifie#
' Since the algeraic su* of all 1oltages ie V& V'aroun# a close# loo$ is
eual to V Thus Kirch-hoffs Voltage La is 1erifie#
PRECA)TION(:
5a
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