Electric Circuit Analysis: Model Question and Answer
Solved Anna University Question Paper with Answer - 2 (PART A)
Electric Circuit Analysis
Electric Circuit Analysis: Model Question and Answer : Solved Anna University Question Paper
Question Paper Code: 80124
B.E./B.Tech. DEGREE EXAMINATIONS,
APRIL/MAY 2019.
Second Semester
Electrical and Electronics
Engineering
EE 8251-CIRCUIT THEORY
(Common to Electronics and
Instrumentation Engineering/B.E. Instrumentation and Con troll Engineering)
(Regulation 2017)
Time: Three hours Maximum: 100
Marks
Answer ALL questions.
PART A-(10 x 2 = 20 Marks)
1. State Kirchoff's Current law.
It states that "the algebraic sum of the
current meeting at a junction (node) is equal to zero".
2. Find the equivalent resistance
of circuit with three resistors connected in series each having a resistance
value of 3 Ohms.
Req
= R1 + R2 + R3
Req
=3 + 3 + 3
Req
= 9Ω
3. What is the condition for
maximum power transfer in DC circuits?
Pmax
= V2 / 4 RL
Maximum
power win be delivered from a voltage source to load, when load resistance is
equal to internal resistance of the source.
4. Sate Thevenin's theorem.
Any
liner active network with output terminals can be replaced by a single voltage
(Vth) in series with a single impedance (Rth).
5.Write down the time constant of
RL and RC circuit.
Time
constant of RL
T
= I (1- e-1)
T
= 63.2% of I
Time
constant of RC T = 0.368 × I
6. How does an inductor act at t = 0+
and t = a?
t
= 0
7. Define Quality factor.
It
is the ratio of f0, to (f2-f1) is called quality factor of a coil. It is
represented by Q
Q
=f0 / f2 - fi (or)
1/R √ L/C
8. Find the current through the
circuit with 5 Ohms resistor across a voltage source of 10cos(50t - 50°) Volts.
9. Mention the expression for
resonant frequency in series resonance.
f0=
1/ 2π √
LC
10. Define coefficient of coupling.
Coefficient
of coupling is defined is defined as ratio of mutual inductance to the
geometric mean of the self inductance
K
= M / √√L1
L2
Electric Circuit Analysis: Model Question and Answer : Tag: : Electric Circuit Analysis - Solved Anna University Question Paper with Answer - 2 (PART A)
Electric Circuit Analysis: Model Question and Answer
Under Subject
Electric Circuit Analysis
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