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Consider the circuit shown in the figure below,

Assume $V_s=\left(250\sin 500t\right)V$ and $Z_0=(100-j200)\Omega$. If $Z_L$ be a parallel combination of R and C, then the value of R and C such that the maximum power transfer takes from source to load are respectively

In the circuit shown below, $V_s$ is constant voltage source and $I_L$ is a current load.



The value of $I_L$ that maximixes the power absorbed by the constant current load is

The value of the resistance, R, connected across the terminals, A and B, (ref. Fig.), which will absorb the maximum power, is

For the Y-network shown in the figure, the value of $R_1$ (in $\Omega$) in the equivalent $△$-network is

1. 10

The network of the figure shown consists of resistive network described as$y_{11}=y_{22}=y_{21}=2\mho and{Y}_{12}=1\mho$, then the value of voltage $V_1$ is

For the circuit shown in figure. The Norton equivalent source current value is_____A and its resistance is_____ Ohms.

In the circuit shown, if $v\left(t\right)=2sin\left(1000t\right)$ volts. $R=1k\Omega$ and $C=1\mu F$. then the steady-state current $i\left(t\right)$, in milliamperes (mA), is

For the circuit shown in the figure below, assume that inital charge on capacitor as $250\mu C$. The current $i\left(t\right)$ flowing through swtich at $t=0$ will be

The Norton's equivalent source in amperes as seen into the terminals X and Y is

1. 1

Find the value of Vp in the figure shown.

A balanced three-phase, star-connected load of 100 kW takes a leading current of 80 A, when connected across a 3-phase 1100 V, 50 Hz supply. The capacitance of the load per phase is

If a two-port network is reciprocal, then we have with the usual notation, the following relationship

For a 2-port network consisting of an ideal lossless transformer, the parameter $S_{21}$ (rounded off to two decimal places) for a reference impendance of $10\Omega$, is

1. 0.8

Find the voltage $V_q$

The y-parameters of a two-port network are

$\left[y\right]=\left[\begin{array}{cc}5& 3\\ 1& 2\end{array}\right]S$

A resistor of 1 $\Omega$ is connected across as shown in figure below. The new y parameter would be

In the circuit shown below, the output impedance $\left(Z_{out}\right)$ is

Consider the circuits shown in the figure. The magnitude of the ratio of the currents, i.e, $\left|I_1/I_2\right|$, is

1. 1

1. 30

In the circuit shown below, the current I is equal to

Consider the circuit shown in the figure below:

The voltage 'V' across the $1\Omega$ resistor is

In the microprocessor controlled measurement scheme shown in the figure, $R_x$ is the unknown resistance to be measured, while $R_{ref}$ and $C_{ref}$ are known. $C_{ref}$ is charged from voltage $V_L$ to $V_H$ (by a constant DC voltage source $V_S$), once through $R_{ref}$ in $T_{ref}$ seconds and then discharged to $V_L$. It is again charged from voltage $V_L$ to $V_H$ through $R_x$ in $T_x$ seconds.



if $T_x$ = $k{T}_{ref}$ then

1. 8

A two-port network shown below is excited by external dc sources. The voltage and current are measured with voltmeters $V_1$, $V_2$ and ammeters $A_1$, $A_2$ (all assumed to be ideal) as indicated. under following switch conditions, the readings obtained are:



$\left(i\right)S_1-open,S_2-closed{A}_1=0A,V_1=4.5V,V_2=1.5V,A_2=1A$



$\left(ii\right)S_1-closed,S_2-open{A}_1=4A,V_1=6V,V_2=6V,A_2=0A$





The Z-parameter matrix for this network is

In the circuit shown below, initially the switch $S_1$ is open, the capacitor C1 has a charge of 6 coulomb, and the capacitor C2 has 0 coulomb. After $S_1$ is closed, the charge on C2 in steady state is Coulomb.

1. 4

1. 35.55

1. 28.036

The ABCD matrix for a two-port network is defined by

$\left[\begin{array}{c}{V}_1\\ I_1\end{array}\right]=\left[\begin{array}{cc}A& B\\ C& D\end{array}\right]\left[\begin{array}{c}{V}_2\\ -I_2\end{array}\right]$





The parameter B for the given two-port network(in ohms, correct to two decimal places) is

1. 4.8

Find the value of $V_{xy}$

1. 9

For a series RLC resonant circuit, the resonant frequency is given as $8MHz$ and the bandwidth is $7.2kHz$. If the value of effective resistance is $4.5\Omega$ then the capacitance C will be equal to

The half - power bandwidth of the resonant circuit of figure can be increased by:

For the circuit shown below,



the voltage across the capacitor $\left(V_c\right)$ is

When port $1$ of a two port circuit is short circuited, $I_1=4I_2$ and $V_2=0.25I_2$. Which of the following is true?

1. 10

Assuming ideal opamp, the RMS voltage (in mV) in the output $V_0$ only due to the 230 V, 50 Hz interference is (up to one decimal place)

1. 10.84

If the band stop filters is to reject a 200 Hz Sinusoid, while passing other frequencies calculate the values of L and C. Take $R=150\Omega$ and bandwidth as 100 Hz.

Consider the circuit shown in the figure below;

The Norton's equivalent seen across the terminal A and B is

The Z-matrix of a 2-port network is given by $Z=\left[\begin{array}{cc}0.9& 0.2\\ 0.2& 0.6\end{array}\right]$. The element $Y_{22}$ of the corresponding $Y-$matrix of the same network is given by

In the figure, the voltage are $V_1\left(t\right)=100cos\left(\omega t\right),V_2\left(t\right)=100cos(\omega t+\frac{\pi }{18})and{V}_3\left(t\right)=100cos(\omega t+\frac{\pi }{36})$. The circuit is in sinusoidal steady-state, and R<< $\omega L$. $P_1,P_{2}and{P}_3$ are the average power outputs. Which one of the following statements is true?

The Z-parameters of the network are

Figure shows a dc resistive network and its graph is drawn a side. A 'proper tree' chosen for analysing the network will not contain the edges:

The circuit shown below is driven by a sinusoidal input $v_i=V_{p}cos\left(t/RC\right)$. The steady output $V_0$ is

The rms value of the phasor current I in the circuit shown (in amperes) is

1. 1

Find the value of R that results in maximum power transfer to the 10 $\Omega$ resistor. Also find the maximum power $\left(P_{max}\right)$

The mutual inductance between two coupled coils is $25mH$. If the turn in one coil is doubled and that in the other is halved, then the mutual inductance will become

In the given circuit the mesh current $I_1,I_{2}and{I}_3$ are

Find the parameter $C$ from the given $Z$ network



$V_1=6I_1+4I_2$

$V_2=4I_1+6I_2$

Find the parameter $Z_{12}$ from the given $ABCD$ parameters



$V_1=10V_2+1.5(-I_2)$

$I_1=2V_2+4(-I_2)$