Two systems with impulse responses h1(t) and h2(t) are connected in cascade. Then the overall impulse response of the cascaded system is given by
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Solution
Option (c) is correct.If the two systems with impulse response h1(t) and h2(t) are connected in cascaded configuration as shown in figure, then the overall response of the system is the convolution of the individual impulse response.
A separately excited dc machine, having an armature resistance of 2 ohms was working on a 220 V supply and drawing 10 A armature current from the source when the supply voltage suddenly dropped to 200 V. Assuming that the field circuit source voltage remained unaffected,how will the armature current of the machine react to the change?
The equivalent capacitance of the input loop of the circuit shown is
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Solution
In the circuit shown below, if the source voltage Vs = 100 ∠53.13° V then the Thevenin’s equivalent voltage in Volts as seen by the load resistance RL is
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Solution
Option (c) is correct.
For evaluating the equivalent thevenin voltage seen by the load RL, we open the circuit across it (also if it consist dependent source).The equivalent circuit is shown below
As the circuit open across RL so
I2 = 0
or,j40 I2= 0
For the differential equation dy⁄dt + 5y = 0, with y(0) = 1,the general solution is
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Solution
Directional derivative of f (x, y, z) = xy2+ yz3 at the point(2, –1, 1) in the direction of vector \(\hat{i}+2\hat{j}+2\hat{k}\) is
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Solution
If \(\begin{vmatrix} a &a^{2} &a^{3} &-1 \\ b &b^{2} &b^{3} &-1 \\ c &c^{2} &c^{3} &-1 \end{vmatrix}\) = 0 in which a, b, care different, then abc is
The corona contributes a 3rd harmonic to the charging current of the line, because it
The surge impedance loading of a long transmission line can be increased without adversely affecting its stability by connecting
A 75 MVA, 10 KV synchronous generator has xd= 0.4p.u. The xd value (in p.u.) to a base of 100 MVA, 11 KV is
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Solution