00000EC201121905

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

a) Find the ABCD parameters for the given network. Given 214 Q, 212 = 142, (8)
221= 3Q and 222 = 3८2

0) Explain hybrid parameters of two port network. (7)
c) Explain dot convention in coupled coils. (5)
a) Explain series and parallel connections of two port networks. (8)
b) Determine the interrelationship between hybrid and Z parameters. (6)
c) Explain the following terms (6)

(i) Bandwidth (ii) Q- factor and (iii) Selectivity
a) Two similar coupled coils of resistance 5Q and self inductance 1 11 areinseries. (8)
This is in series with a 100 Micro Farad Capacitor. A 220V, 50 Hz source
energise the circuit. Draw the dotted equivalent circuit. Calculate the coefficient
of coupling so that circuit behaves as a pure resistor.
b) Derive the output voltage expression for a single tuned circuit. (7)
c) A double tuned circuit is tuned to a frequency of 750 Hz. when excited with (5)
voltage source at critical coefficient of coupling, the maximum voltage across
C2 = 20 V. Find the coefficient of coupling and the source voltage.

Given Q; =6, Q, = 10 २1 = 102 and 1२, = 0

ok ok

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