The bus impedance matrix of a 3-bus system (in pu) is

$$ Z_{\text {bus }}=\left[\begin{array}{lll} j 0.059 & j 0.061 & j 0.038 \\ j 0.061 & j 0.093 & j 0.066 \\ j 0.038 & j 0.066 & j 0.110 \end{array}\right] $$

A symmetrical fault (through a fault impedance of $j 0.007$ p.u.) occurs at bus 2 . Neglecting pre-fault loading conditions, the voltage at bus 1 , during the fault is __________ p.u. (round off to three decimal places).

In the system shown below, the generator was initially supplying power to the grid. A temporary LLLG bolted fault occurs at F very close to circuit breaker-1. The circuit breakers open to isolate the line. The fault self-clears. The circuit breakers reclose and restore the line. Which one of the following diagrams best indicates the rotor accelerating and decelerating areas?

Two units, rated at 100 MW and 150 MW , are enabled for economic load dispatch. When the overall incremental cost is $10,000 \mathrm{Rs}$./MWh, the units are dispatched to 50 MW and 80 MW respectively. At an overall incremental cost of $10,600 \mathrm{Rs} . / \mathrm{MWh}$, the power output of the units are 80 MW and 92 MW , respectively. The total plant MW-output (without overloading any unit) at an overall incremental cost of $11,800 \mathrm{Rs} . / \mathrm{MWh}$ is __________ (round off to the nearest integer)

Consider a discrete-time linear time-invariant (LTI) system, $\boldsymbol{S}$, where

$$ y[n]=S\{x(\mathrm{n})\} $$

$$Let\,\,\,\, S\{\delta[n]\}=\left\{\begin{array}{lc} 1, & n \in\{0,1,2\} \\ 0, & \text { otherwise } \end{array}\right. $$

where $\delta[n]$ is the discrete-time unit impulse function. For an input signal $x[n]$, the output $y[n]$ is