Norton's equivalent circuit consists of

voltage source in parallel with impedance

voltage source in series with impedance

current source in series with impedance

current source in parallel with impedance

The maximum power transfer theorem can be applied

only to d.c. circuits

only to a.c. circuits

to both d.c. and a.c. circuits

to neither of the two

What is the impedance of an ideal parallel resonant circuit without resistance in either branch?

Zero

Inductive

Capacitive

Infinite

The differential equation of an electric current passing through a circuit containing resistance R and an inductance L in series with the voltage source V is given by

V R fidt +Li

V =Ri L

Ri L fidt

d^2i/dt^2 R di/L dt

The time constant ofa'6eries RC circuit is

1/RC

R/C

RC



The driving point impedance is defined as

the ratio of transform voltage to transform current at the same port

the ratio of transform voltage at one port to the transform current at the other port

Both and

None of the above

For a two-port network to be reciprocal

Z11 Z22

Y21 Y22

h21 -h12

AD — BC 0

2. Use Mesh analysis method to find out the current through the 20 ohms resistor as shown in figure 1.

<img src='./qimages/8857-2a.jpg'>

A source network is shown in figure 2.

What impedance ZL when connected
to A — B transfers maximum power
in ZL

What is the value of maximum
power

<img src='./qimages/8857-2b.jpg'>

Find the resonant frequency for a series circuit if L =32 micro Henry and C =450 pF.

Determine the required value of R for the quality factor Q =0.05. Find the lower and upper cut-off frequencies and bandwidth.

Figure 3 shows a network in which there is no initial voltage across the capacitor and no initial current through the inductor. At t the switch K is closed. Find i1,i2, di1/dt and di2/dt at

<img src='./qimages/8857-3b.jpg'>

A resistive bridged-T, two-port network is shown in figure Find the values of









<img src='./qimages/8857-4a.jpg'>

For the network shown in figure pole­zero pattern has been represented in figure 6

<img src='./qimages/8857-4b.jpg'>

Find the numerical values of L and Given 1.

Find the h-parameters of the network shown in figure 7.

<img src='./qimages/8857-5a.jpg'>

Derive the required condition for a two-port network to be reciprocal.

6. Design K-type band pass filter having a design impedance of 500 ohms and cut off frequencies 1 kHz and 10 kHz.

The image impedances of the network in figure 8 are Zi1 100 ohms and Zi2 =50 ohms Calculate the values of the impedances Z1 and Z2.

<img src='./qimages/8857-6b.jpg'>

7. Write short notes on any four of the following:

Norton's Theorem

Resonance Curve and Quality Factor

Composite Low Pass Filter

Symmetrical n-attenuator

Cascade Connection of Two-port Network