Recent activity - GO Electrical

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GATE2019 EE: 27
The closed-loop line integral $\oint_{|z| = 5} \frac{z^3 + z^2 + 8}{z+2}dz$ Evaluated Counter-clockwise is $+8j\pi$ $-8j\pi$ $-4j\pi$ $+4\pi$

edited Jul 23 in new by ajaysoni1924 (100 points)

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GATE2019 EE: 28
A periodic function $\large{f(t)},$ with a period of 2$\pi$, is represented as its fourier series, $\large{f(t)} = a_0 + \sum_{n=1}^{\infty }a_n cos nt + \sum_{n=1}^{\infty} b_n sin nt.$}$ If $\large{f(t)} = \left\{\begin{matrix} Asint, & 0 \le t\le \pi\\ 0, & \pi ... $a_1 = \frac{A}{2}; b_1 = 0$ $a_1 = 0;b_1 = \frac{A}{\pi}$ $a_1 = 0;b_1 = \frac{A}{2}$

edited Jul 23 in new by ajaysoni1924 (100 points)

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GATE2019 EE: 26
Consider a $2\times 2$ matrix $M=\begin{bmatrix} v_1 & v_2 \end{bmatrix}$, where $v_1$ and $v_2$ are the column vectors. Suppose $M^{-1}=\begin{bmatrix} u_1^T \\ u_2^T \end{bmatrix}$, where $u_1^T$ and $u_2^T$ are the row ... Statement 1 is True and Statement 2 is false Statement 2 is true and Statement 1 is false Both the Statements are true Both the statements are false

edited Jul 23 in new by ajaysoni1924 (100 points)

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GATE2019 EE: 25
The output voltage of a single-phase full-bridge voltage source inverter is controlled by unipolar PWM with one pulse per half cycle. For the fundamental rms Component of the output voltage to be 75% of DC voltage, The required pulse width in degrees (round off up to one decimal place) is ___________.

edited Jul 23 in new by ajaysoni1924 (100 points)

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GATE2019 EE: 22
Five alternators each rated 5 MVA, 13.2 kV with 25% of reactance on its own base are connected in parallel to a busbar. The short circuit level in MVA at the busbar is ____________.

edited Jul 23 in new by ajaysoni1924 (100 points)

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GATE2019 EE: 23
The total impedance of the secondary winding, leads, and burden of a 5 A CT is 0.01 $\Omega$. If the fault current is 20 times the rated primary current of the CT, the VA output of the CT is_________.

edited Jul 23 in new by ajaysoni1924 (100 points)

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7

GATE2019 EE: 24
The Rank of the matrix, $M = \begin{bmatrix} 0 &1 &1 \\ 1& 0 &1 \\ 1& 1 & 0 \end{bmatrix}$, is ______________.

edited Jul 23 in new by ajaysoni1924 (100 points)

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GATE2019 EE: 21
The $Y_{bus}$ matrix of a two-bus power system having two identical parallel lines connected between them in pu is given as $Y_{bus} = \begin{bmatrix} -j8 & j20 \\ j20& -j8 \end{bmatrix}$ The magnitudde of the series reactance of each line in pu (round off upto one decimal place) is__________.

edited Jul 23 in new by ajaysoni1924 (100 points)

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GATE2019 EE: 20
A co-axial Cylindrical capacitor is shown in the Figure(i) has dielectric with relative permittivity $\epsilon_{r1} = 2.$. When one – fourth portion of the dielectric is replaced with another dielectric of relative permittivity $\epsilon_{r2}$, as shown in the Figure(ii), the capacitance is doubled. The value of $\epsilon_{r2}$ is _________.

edited Jul 23 in new by ajaysoni1924 (100 points)

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10

GATE2019 EE: 19
The current $I$ is flowing in the circuit shown below in amperes (round off to one decimal place) is _____

edited Jul 23 in new by ajaysoni1924 (100 points)

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11

GATE2019 EE: 2
$M$ is $2 \times 2$ matrix with eigenvalues $4$ and $9.$ The eigenvalues of $M^{2}$ are $4$ and $9$ $2$ and $3$ $-2$ and $-3$ $16$ and $81$

answer selected Jun 7 in new by srestha (110 points)

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GATE2019 EE: 18
If $f=2x^{3}+3y^{2}+4z,$ the value of line integral $\int_{c}$ grad$f.dr$ evaluated over contour $C$ formed by the segments $(-3,-3,2)\rightarrow(2,-3,2)\rightarrow(2,6,2) \rightarrow(2,6,-1) $ is___________.