I B.Tech - Regular Examinations, June 2009
First Year
Netwrok Analysis - SET NO: 3
(Regulation 2007)
Time : 3 hours |
Maximam Marks:80 |
Answer any FIVE Questions
1. (a) Explain source transformation with examples.
(b) Two resistors are connected in parallel and a voltage of 200 volts is applied
to the terminals. The total current taken is 25A and the power dissipated in
one of the resistors is 1500W. What is the resistance of each element?
2. What is coefficient of coupling? How can it be varied? Derive an expression for the
same.
3. A parallel circuit has two branches, branch 1 has a resistance of 5
connected in
series with an inductance 10 mH. A capacitor is connected in branch 2, the parallel
circuit is connected across a 230 V, 50Hz supply. If the circuit is to be in resonance
find the value of the capacitance. Find the current drawn from the supply and also
find the currents in branches 1 and 2. Draw the vector diagram.
4. Find the currents in all resistors for the network, shown in figure 4 using loop
analysis method.
5. Using Norton’s theorem, find the current through the load impedance ZL, for the
network as shown in figure 5.
6. Find the hybrid and y-parameters for the network shown in figure 6
7. In the circuit shown in figure 7, Eg (t) = 2.5 t Volts. What are the values of i(t)
and VL(t) at t = 4 seconds.
8. Design a composite low pass filter to meet the following specifications. The filter is
to be terminated in 500 ohms resistance and it is to have a cutoff of 1000 Hz with
very high attenuation at 1065 and 1250 Hz.
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