ISRO Scientist or Engineer Electronics 2010

Instructions

For the following questions answer them individually

ISRO Scientist or Engineer Electronics 2010 - Question 1


An LTI system has the input signal x(n). Which of the following sequence of operations is most appropriate to get output $$y(n) = x \left(n - \frac{M}{L}\right)$$.

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ISRO Scientist or Engineer Electronics 2010 - Question 2


Consider a low pass random process with a white noise power spectral density
$$ S_{x} (\omega)=\frac{N}{2}$$ where $$-2 \pi B \leq \omega \leq 2 \pi B $$
                    0 elsewhere
The Auto-correlation function $$R_{x}(\tau)$$ is

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ISRO Scientist or Engineer Electronics 2010 - Question 3


Pole-zero plot of a digital filter is shown below, what is the type of filter?

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ISRO Scientist or Engineer Electronics 2010 - Question 4


Determine the DTFT of the sequence $$y[n] = (n + 1) \alpha^{n} u[n], \mid \alpha \mid < 1.u[n]$$ is unit step sequence

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ISRO Scientist or Engineer Electronics 2010 - Question 5


The function f(t) has the Fourier transform g$$(\omega)$$. The Fourier transform of g(t) is

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ISRO Scientist or Engineer Electronics 2010 - Question 6


The purpose of Design for Test (DFT) process in ASIC design flow is

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ISRO Scientist or Engineer Electronics 2010 - Question 7


The coupling between the two inductors is increased from zero in the circuit shown.' Which of the following statements is true?

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ISRO Scientist or Engineer Electronics 2010 - Question 8


Write a Boolean expression for Z in terms of A, B, C, D and E. You need not simplify the expression.

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ISRO Scientist or Engineer Electronics 2010 - Question 9


Aparallel plate capacitor of 100 pf having an air dielectric is charged to 10 kilovolts. It is then electrically isolated. The plates are pulled away from each other until the distance is ten times more than before. Estimate the energy neededto pull the plates.-

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ISRO Scientist or Engineer Electronics 2010 - Question 10


How could Schroedinger’s equation be relevant in the practical design of a CathodeRay Tube?

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