#561
List item number 561
A trasmitting antenna radiates $251 \mathrm{~W}$ isotropically. A receiving antenna, located $100 \mathrm{~m}$ away from the transmitting antenna, has an effective apertu...
#562
List item number 562
In air, a lossless transmission line of length $50 \mathrm{~cm}$ with $\mathrm{L}=10 \; \mu \mathrm{H} / \mathrm{m}, \mathrm{C}=40 \; \mathrm{pF} / \mathrm{m}$ is operate...
#563
List item number 563
A plane wave propagating through a medium $\left[\varepsilon_{\mathrm{r}}=8, v_{\mathrm{r}}=2\right.$, and $\left.\sigma=0\right]$ has its electric field given by $\overr...
#564
List item number 564
In the circuit of the the switch '$\text{S}$' has remained open for a long time. The switch closes instantaneously at $t=0$Find $V_{0}$ for $t \leq 0$ and as $t \rightarr...
#565
List item number 565
For the network shown in the given figure is evaluate the current $I$ flowing through the $2 \; \Omega$ resistor using superposition theorem.
#566
List item number 566
A coil with a quality factor $(Q)$ of $10$ is put in series with a capacitor $\mathrm{C}_{1}$ of $10 \; \mu \mathrm{F}$, and the combination is found to draw maximum curr...
#567
List item number 567
A bipolar junction transistor amplifier circuit is shown in the figure is Assume that the current source $\text{I}_{\text {bias}}$ is ideal, and the transistor has vary l...
#568
List item number 568
A $\text{JFET}$ having $\mu=50$ and $r_{d}=10 \mathrm{~K} \Omega$ is used in a common - source configuration as shown in the given figure. The $\text{JFET}$ capacitances ...
#569
List item number 569
Neatly sketch and label the $\text{dc}$ transfer characteristic (i.e., $\mathrm{V}_{0} v s . \mathrm{V}_{i n}$ ) of the circuit shown in the given figure as $V_{\text {in...
#570
List item number 570
A transistor $\mathrm{LC}$ oscillator circuit is shown in the given figure. Assume that the transistor has very high $\beta$ (so that you may neglect $r_{d}$ ). Derive an...
#571
List item number 571
In the $\text{CMOS}$ inverter circuit shown in the figure is the input Vi makes a transition from $\mathrm{V}_{\mathrm{OL}}(=0 \mathrm{~V})$ to $\mathrm{V}_{\mathrm{OH}}(...
#572
List item number 572
The circuit diagram of a synchronous counter is shown in the given figure. Determine the sequence of states of the counter assuming that the initial state is '$000$'. Giv...
#573
List item number 573
In a certain application, four inputs $A, B, C, D$ (both true and complement forms available) are fed to logic circuit, producing an output $F$ which operates a relay. Th...
#574
List item number 574
An $8085$ assembly language program is given below$\begin{array}{ll} & \text{ MVIC, 03H } \\ & \text { LXIH, 2000H } \\ \text { LOOP : } & \text { MOV A, M } \\ & \text {...
#575
List item number 575
The loop transfer function of a feedback control system is given by\[\mathrm{G}(s) \mathrm{H}(s)=\frac{\mathrm{K}(s+1)}{s\left(1+\mathrm{T}_{S}\right)(1+2 s)}, \mathrm{K}...
#576
List item number 576
The asymptotic Bode plot of the minimum phase open-loop transfer function $\mathrm{G}(\mathrm{s}) \mathrm{H}(s)$ in as shown in the figure is Obtain the transfer function...
#577
List item number 577
Consider a feedback system with the open-loop transfer function, given by\[\mathrm{G}(s) \mathrm{H}(s)=\frac{\mathrm{K}}{s(2 s+1)}\]Examine the stability of the closed-lo...
#578
List item number 578
A baseband signal $\mathrm{m}(\mathrm{t})$ modulates a carrier to produce the angle modulated signal, $\text{Ac} \cos \left[2 \pi \times 10^{8} t+k_{p} \; m(t)\right]$, w...
#579
List item number 579
Input to a linear delta modulator is a sinusoidal signal whose frequency can vary from $200 \mathrm{~Hz}$ to $4000 \mathrm{~Hz}$. The input is sampled at eight times the ...
#580
List item number 580
The power spectral density $\text{(PSD)}$ of a noise process is given by$\mathrm{S}_{\mathrm{N}}(f)=\left\{\begin{array}{cc}10^{-8}\left(1+\frac{|f|-10^8}{10^8}\right) & ...
#581
List item number 581
A plane wave in free space with $\vec{E}=(\sqrt{\pi})(10.0$ $\left.\hat{x}+11.8 \hat{y}) \cdot \exp j\left(4 \pi \times 10^{8} t-k z\right)\right]$,where $\hat{x}$ and $\...
#582
List item number 582
A $100 \mathrm{~m}$ section of an air-filled rectangular waveguide operating in the $\mathrm{TE}_{10}$ mode has a cross-sectional dimension of $1.071 \mathrm{~cm} \times ...
#583
List item number 583
The average power of an omni directional antenna varies as the magnitude of $\cos \theta$, where $\theta$ is the azimuthal angle. Calculate the maximum Directive Gain of ...
#584
List item number 584
This question consists of TWENTY FIVE sub-questions $(1.1 - 1.25)$ of ONE mark each. For each of these sub-questions, four possible answers ( $\text{A, B, C}$ and $\text{...
#585
List item number 585
If each branch of a Delta circuit has impedance $\sqrt{3} Z$, then each branch of the equivalent Wye circuit has impedance.$\frac{Z}{\sqrt{3}}$$3 Z$$3 \sqrt{3} \mathrm{Z}...
#586
List item number 586
The transfer function of a system is given by $H(s)=\frac{1}{s^{2}(s-2)}$. The impulse response of the system is$\left(t^{2 *} e^{-2 t}\right) \mathrm{U}(t)$ (* denotes c...
#587
List item number 587
The admittance parameter $\mathrm{Y}_{12}$ in the $2$-port network in the figure,$-0.2 \; \mathrm{mho}$$0.1 \; \mathrm{mho}$$-0.05 \; \mathrm{mho}$$0.05 \; \mathrm{mho}$
#588
List item number 588
The region of convergence of the $z$-transform of a unit step function is$|z|>1$$|z|<1$(Real part of $z)>0$( Real part of $z)<0$
#589
List item number 589
The current gain of a BJT is$g_{m} r_{\circ}$$\frac{g_{m}}{r_{\circ}}$$g_{m} r_{\pi}$$\frac{g_{m}}{r_{\pi}}$
#590
List item number 590
MOSFET can be used as acurrent controlled capacitorvoltage controlled capacitorcurrent controlled inductorvoltage controlled inductor
#591
List item number 591
The effective channel length of a MOSFET in saturation decreases with increase ingate voltagedrain voltagesource voltagebody voltage
#592
List item number 592
The ideal $\text{OP-AMP}$ has the following characteristics.$\mathrm{R}_{\mathrm{i}}=\infty, \mathrm{A}=\infty, \mathrm{R}_{0}=0$$\mathrm{R}_{\mathrm{i}}=0, \mathrm{~A}=\...
#593
List item number 593
The $2$'s complement representation of $-17$ is$01110$$01111$$11110$$10001$
#594
List item number 594
Consider the following two statements :$\text{Statement 1: A}$ stable multivibrator can be used for generating square wave.$\text{Statement 1: B}$ stable multivibrator c...
#595
List item number 595
For the ring oscillator shown in the figure, the propagation delay of each inverter is $100$ pico sec. What is the fundamental frequency of the oscillator output?$10 \; \...
#596
List item number 596
An $8085$ microprocessor based system uses a $4 \mathrm{K} \times 8 \text{bit RAM}$ whose starting address is $\text{AA00 H}$. The address of the last byte in this $\text...
#597
List item number 597
The equivalent of the block diagram in the figure, given in
#598
List item number 598
If the characteristic equation of a closed-loop system is $s^{2}+2 s+2=0$, then the system isoverdampedcritically dampedunderdampedundamped
#599
List item number 599
The root-locus diagram for a closed-loop feedback system is shown in the figure is. The system is overdamped.only if $0 \leq \mathrm{K} \leq 1$only if $1 < \text{K} < 5$o...
#600
List item number 600
The Nyquist plot for the open-loop transfer function $G(s)$ of a unity negative feedback system is shown in the figure, if $G(s)$ has no pole in the right-half of $s$-pla...