APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY Previous Years Question Paper & Answer

Course : B.Tech

Semester : SEMESTER 3

Subject : Network Theory

Year : 2020

Term : SEPTEMBER

Scheme : 2015 Full Time

Course Code : EC 201

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function and ൪) Find response of a system for input x(t) = 4 e-*

A series RLC circuit with R= 10002, L= 0.1 H and C= 40 uF has a de voltage of
200 V applied at t= 0. Find the transient current.

Derive the response of a series RC circuit for a step input

What are the restrictions on poles and zeros for the transfer function and driving
point functions

A 100uF capacitor has an initial charge Qo = 0.002 C is connected in series with
20002 across 50۷ supply at time t=0. Find the transient current.

Define poles and zeros of a transfer function. For the given transfer function find
the poles and zeros and also draw the pole zero plot

1 (s) = 20 (൭-5) / (s* + 5s+ 6)

PART C
Answer any two full questions, each carries 20 mark.

Two inductively coupled coils have self-inductance ‏رآ‎ = 50mH, 1.2 = 200mH.
Given k = 0.5. Find the mutual inductance between the coil

Two coupled coils have a coefficient of coupling k= 0.83. With coill open, a
current of SA flows in coil 2. Given flux in coil2 is 0.35 milli weber. Find 1.1. 12
and M.

A coil having an inductance and resistance of 50 mH and 100Q is connected in
series with a capacitor and a 100V, 1 kHz source. Find the value of capacitance
that will cause resonance in the circuit. Find the resulting current at resonance
Define characteristic impedance and image impedance

Explain Y parameters.

Derive the inter relation between open circuit impedance parameters and
transmission parameters

In a RLC series circuit, the resistance, inductance and capacitance are 10Q,
100 mH and 10 uF. Find രം, ೧1 and ‏.ده‎ Also find band width and selectivity
Explain parallel inter connection of two port networks

The h parameters of a two port network are hy; = 1.5 kQ, 112 = 2 x 103 + 121 =
250 and 122 = 150 x 10" . Find Z parameters and draw its equivalent

Explain Double tuned coupled coils

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