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080EET201122006

Module 4

A resistor, capacitor and an inductor are connected in series with a 230 V,
variable frequency AC source. When the supply frequency is varied to 50112, a
maximum current of 2A flows and the corresponding voltage across the
capacitor is 500 V. Determine,

(i) Resistance, inductance and capacitance of the circuit.

(ii) Q- factor and bandwidth of the circuit.

1
(iii)The source frequencies at which the circuit current is 7 times the

maximum current.

A 400 V, three-phase supply feeds an unbalanced three-wire, star-connected
load. The branch impedances of the load are Zp = 100, Zy = —j5 and
Zp = /15൧. Calculate the line currents.
Module 5
a) Find the transmission parameters of the network shown in the figure.
11 6೧ 12

ಕರಡಿ ` [ ಗ
a

Vi < 20 = 40 V2

0) 11൩0 the driving point impedance of the network given below.

at
20 <> 10

۸

> 1

a) Discuss the series and cascade interconnection of two port networks.
b) The Y parameters of a two port network are പ = 30, ಗ್ರ ८-10, ‏رولا‎ = -10

and Y22 = 2U. Determine the equivalent T-network.
ak ok

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