Veer Narmad South Gujarat University 2011-1st Year B.Sc Electronics SB-0613 - 2 ( Old ) - Question Paper
SB-0613
First Year B. Sc. Examination March / April - 2011 Electronics : Paper - II
[Total Marks : 70
Time : 3 Hours]
Instructions
Seat No.:
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Fillup strictly the details of signs on your answer book.
Name of the Examination :
F. Y. B. Sc.
Name of the Subject:
Electronics - 2
Student's Signature
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-Subject Code No.: |
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-Section No. (1,2,.....): Nil |
Deduce Laplace transform of nth order integral.Deduce. Find the Laplace transform of :
(1) F(t) = Exp (at)
(a)
(b)
(a)
(a)
(b)
(a)
(2) F(t) = cos(&>t).
Reduction of complicated network using
14
Derive equation for star and delta
2sc*
loc, lsc, zoc,
network.
OR
State and prove maximum power transfer theorem using suitable example.
What is an ideal current source? State and prove Nortons Theorem.
Find the Mutual inductance (M) and co-efficient of coupling (k) of two magnetically coupled coils. If the coil has self inductance of 250 /uH each. If series aiding inductance (La) of 550 /uH and series opposing inductance (Lo) of 450 jliH .
10
In a parallel resonance circuit R = 100 q, L = 2.5 H and C = 0.1 micro farad, then calculate impedance and anti-resonance of the circuit.
(b)
(a)
OR
An R-L-C circuit containing capacitor of reactance 12 q a coil having a resistance 60 q and inductive reactance of 180 q . The combination is connected across a supply of 200V, 50 Hz. Compute (1) Current, (2) Power factor and (3) Power taken by the circuit.
10
In the below given circuit using Thevenines theorem find the current through 12 q.
(b)
3i2 a
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120 |
Fig. 1 0
5 Write short note on any two : 7x2=14
(a) Evalution of Fourier constant
(b) Types of Filter
(c) Resonance and Anti-resonance
(d) Reciprocity Theorem.
SB-0613] 2 [ 300 ]
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Attachment: |
| Earning: Approval pending. |
