0 0 votes
3 3 answers
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​​​​Which one of the following matrices has an inverse?$\left[\begin{array}{ccc}1 & 4 & 8 \\ 0 & 4 & 2 \\ 0.5 & 2 & 4\end{array}\right]$$\left[\begin{array}{lll}1 & 2 & 3...
2 2 votes
2 2 answers
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​​​​​The number of junctions in the circuit is$6$$7$$8$$9$
0 0 votes
1 1 answer
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​​​​​All the elements in the circuit are ideal. The power delivered by the $10 \mathrm{~V}$ source in watts is$0$$50$$100$dependent on the value of $\alpha$
1 1 vote
0 0 answers
1.8k
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​The circuit shown in the figure with the switch $\text{S}$ open, is in steady state. After the switch $\text{S}$ is closed, the time constant of the circuit in seconds i...
4 4 votes
2 2 answers
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Suppose signal $y(t)$ is obtained by the time-reversal of signal $x(t)$, i.e., $y(t)=x(-t),-\infty<t<\infty$. Which one of the following options is always true for the co...
0 0 votes
0 0 answers
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​​​​​If $u(t)$ is the unit step function, then the region of convergence $\text{(ROC)}$ of the Laplace transform of the signal\[x(t)=e^{t^{2}}[u(t-1)-u(t-10)]\]is$-\infty...
0 0 votes
1 1 answer
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​​​​​A three phase, $50 \mathrm{~Hz}, 6$ pole induction motor runs at $960 \mathrm{rpm}$. The stator copper loss, core loss, and the rotational loss of the motor can be n...
0 0 votes
1 1 answer
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​​​Which one of the following options represents possible voltage polarities in a single phase two winding transformer? Here, $V_{p}$ is the applied primary voltage, $E_{...
0 0 votes
0 0 answers
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​​​​​The figure shows the single line diagram of a 4-bus power network. Branches $b_{1}$, $b_{2}, b_{3}$, and $b_{4}$ have impedances $4 z, z, 2 z$, and $4 z$ per-unit (p...
0 0 votes
0 0 answers
1.3k
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​​​​For the block-diagram shown in the figure, the transfer function $\frac{C(s)}{R(s)}$ is$\frac{G(s)}{1+2 G(s)}$$-\frac{G(s)}{1+2 G(s)}$$\frac{G(s)}{1-2 G(s)}$$-\frac{G...
0 0 votes
0 0 answers
951
951 views
​​​​​Consider the standard second-order system of the form $\frac{\omega_{n}^{2}}{s^{2}+2 \zeta \omega_{n} s+\omega_{n}^{2}}$ with the poles $p$ and $p^{*}$ having negati...
0 0 votes
0 0 answers
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​​​​Consider the cascaded system as shown in the figure. Neglecting the faster component of the transient response, which one of the following options is a firstorder pol...
0 0 votes
1 1 answer
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​​The table lists two instrument transformers and their features:\begin{array}{|l|l|}\hline \text{ Instrument Transformers } &\text{ Features } \\\hline & \text{P}) \tex...
0 0 votes
0 0 answers
915
915 views
​​​​Simplified form of the Boolean function\[F(P, Q, R, S)=\bar{P} \bar{Q}+\bar{P} Q S+P \bar{Q} \bar{R} \bar{S}+P \bar{Q} R \bar{S}\]is$\bar{P} S+\bar{Q} \bar{S}$$\bar{P...
1 1 vote
1 1 answer
2.1k
2.1k views
​​​​​In the circuit, the present value of $Z$ is $1$. Neglecting the delay in the combinatorial circuit, the values of $S$ and $Z$, respectively, after the application of...
0 0 votes
0 0 answers
1.4k
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​​​​​To obtain the Boolean function $\text{F(X, Y)}=\text{X} \bar{\text{Y}}+\bar{\text{X}}$, the inputs $\text{PQRS}$ in the figure should be$1010$$1110$$0110$$0001$
0 0 votes
0 0 answers
1.5k
1.5k views
​​​​​If the following switching devices have similar power ratings, which one of them is the fastest?$\text{SCR}$$\text{GTO}$$\text{IGBT}$$\text{Power MOSFET}$
0 0 votes
0 0 answers
812
812 views
​​​​​A single-phase triac based $\text{AC}$ voltage controller feeds a series $\text{RL}$ load. The input $\text{AC}$ supply is $230 \mathrm{~V}, 50 \mathrm{~Hz}$. The va...
0 0 votes
0 0 answers
1.5k
1.5k views
​​​​​Let $\text{X}$ be a discrete random variable that is uniformly distributed over the set $\{-10,-9, \cdots, 0, \cdots, 9,10\}$. Which of the following random variable...
1 1 vote
0 0 answers
1.1k
1.1k views
​​​​Which of the following complex functions is/are analytic on the complex plane?$f(z)=j \operatorname{Re}(z)$$f(z)=\operatorname{Im}(z)$$f(z)=e^{|z|}$$f(z)=z^{2}-z$