Karnataka State Open University (KSOU) 2011 B.Tech Electrical Engineering ust - EE3002 - Electrical Circuit Theory - Question Paper
EE 3002
III Semester B.Tech. in Meictribai Enmrig Exaiiunatioii, August 2011 b'wkK1;&'2;ijri.' EtECTRKMimOTiTHEdlTf;; f ;A(n: - A 3 33fiBlOB31 ,50njEiK51 SH* .V OOS. SgEllO-Vrf, 80 S .ga ni anrio M i
Time: 3 Hbiirs
Instructions : 1) Answer any five questions
five questions from Part, j 2) Each question carries 5 (fivty marks in Part A and 10 (teh) marks in Part B. .....-.......................
PART-A (5x5=25)
I. AnsweraiiftveorilysqB: s l>ce H &.0"fo sonsioiibri im wmo Oi; to /isPaz&'i A Hi1) State and s 2<5t: l*rj ul l'Ah MaB i
2) Derive the formula for impedance in series RLC circuits. J 3 J'4iRj 1
inaruiJ
. 5&:noV Uii
3) State and explain Thevenins theorem.
4) What is meanty'1Hd('mut,' vntM<ilcv
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5) What are effects of unbalanced load in three phase circuits ?
=50)
I. Answer anv five only :
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9)
11) A current of 20 amps, flows in ajcirsuit the applied
'$1 it?
voltage is 200 V. Find the resistance, reactance and impedance.
J) ,?j||hf5frerit in 20 ohms resistance in the fig. 2 using Nortons thegpgm. f
13) A resistance of 20 ohms an inductance of 0.2 H and a capacitance 1Q0'micro Farad connected in series across a 220 V, 5Q Hz. Demne
i) Impedance ,. .
nistj-
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ii) Current
T iikiqxs Uni aistr
iii) Voltage drop across resistance, mductffiffiqnjj t ~
iv) Power factor , ""'/I v
v SQUJ:yfVj ui ig atD3*i3 ms ife? H
v) Phase angle ,
Vi) Powfr#Ms!afnWw ow* m
14) Three identical coils each havmg a resisjfcce'V l. ohms and inductance ofs
0.5 H are connected in deltallPICOpippllBrnKfi 1
b)jPov/ctor
c) Power
I VtlJO >Vlt Yitjj lv5/;
i d ) i wo wattmeter connected to measure the power of a 3 phase circuit indicated 2500 W and 1
a) Both the readings are positive and x 1 u: '
b) The later reading is obtained after reversing the coiiiefol current coil of the wattmeter. J__ f j
16) The power input to a 2 KV, 50 Hz, 3 phase induction motor run&ng on foU loadi with 90% of efficiency, is measured by two wattmeirwMffieid 3k)0KW and 100KW.Find \ S'- * J ?
ii) Power outpit, *
i) The power input
iii) Power factor and
iv) The line current.
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Attachment: |
| Earning: Approval pending. |
