List of top Network Theory Questions

The circuit shown in the figure is initially in steady state with the switch \(K\) in open condition and \(\overline{K}\) in closed condition. The switch \(K\) is closed and \(\overline{K}\) is opened simultaneously at the instant \(t = t_1\), where \(t_1 > 0\). The minimum value of \(t_1\) in milliseconds, such that there is no transient in the voltage across the 100 μF capacitor, is .............. (Round off to 2 decimal places). \begin{center} \includegraphics[width=0.5\textwidth]{25.jpeg} \end{center}

For the circuit shown, if \(i = \sin(1000t)\), the instantaneous value of the Thevenin's equivalent voltage (in Volts) across the terminals \(a\!-\!b\) at time \(t=5 \, \text{ms}\) is ..................... (Round off to 2 decimal places). \begin{center} \includegraphics[width=0.55\textwidth]{22.jpeg} \end{center}

The admittance parameters of the passive resistive two-port network shown in the figure are: \[ y_{11} = 5 \, S, y_{22} = 1 \, S, y_{12} = y_{21} = -2.5 \, S \] The power delivered to the load resistor \(R_L\) in Watt is .................... (Round off to 2 decimal places). \begin{center} \includegraphics[width=0.55\textwidth]{23.jpeg} \end{center}

For the circuit shown in the figure, $V_{1 = 8$ V, DC and $I_{1} = 8$ A, DC. The voltage $V_{ab}$ in Volts is \underline{\hspace{1cm}} (Round off to 1 decimal place).} \begin{center} \includegraphics[width=0.5\textwidth]{14.jpeg} \end{center}

The value of parameters of the circuit shown in the figure are $R_{1 = 2\Omega, R_{2} = 2\Omega, R_{3} = 3\Omega, L = 10 \,\text{mH}, C = 100 \,\mu\text{F}$. For time $t < 0$, the circuit is at steady state with the switch $K$ in closed condition. If the switch is opened at $t = 0$, the value of the voltage across the inductor ($V_{L}$) at $t = 0^{+}$ in Volts is \underline{\hspace{3cm}} (Round off to 1 decimal place).} \begin{center} \includegraphics[width=0.5\textwidth]{12.jpeg} \end{center}

In the given circuit, current through 30 resistor is equal to.

Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A): In an impedance, Smith chart point r =0, x=0 represents open-circuit point. 
Reason (R): In an impedance, Smith chart, √r = -1 and √i = 0 represents r = 0 and x = 0. 
In the light of the above statements, choose the correct answer from the options given below.

A sinusoidal signal is sampled at 10 kHz and quantized by using 10 bits uniform quantizer. The values of bit rate and $(SNR)_Q $ in this case are

If Port-2 of a 2-port network is terminated with 73 Ω and ABCD parameter of 2-port network are A=C=3, B=5 and D=-2; input impedance of that network is

For the circuit given below, Thevenin's equivalent impedance $(Ζ_{τh})$ of the circuit is given as

In a three phase voltage source inverter operating in square wave mode, the output line voltage is free from