# Consider the following assertions. S1 : For Zener effect to occur, a very abrupt junction is required. S2 : For quantum tunneling to occur, a very narrow energy barrier is required Which of the following is correct

1.  Only S2 is true

2.  S1 and S2 are both true but S2 is not a reason for S1

3.  S1 and S2 are both true and S2 is a reason for S1

4.  Both S1 and S2 are false

4

S1 and S2 are both true and S2 is a reason for S1

Explanation :
No Explanation available for this question

# The  two numbers represented  in signed 2's complement  form are P = 11101101 and Q = 11100110. If Q is subtracted from P, the value obtained in signed 2's complement form is

1.  100000111

2.  00000111

3.  11111001

4.  111111001

4

00000111

Explanation :
No Explanation available for this question

# Consider a system whose input x and output y are related by the equation  Where h(t) is shown in the graph Which of the following four properties are possessed by the system BIBO: Bounded input gives a bounded output Causal: The system is causal LP: The system is low pass LTI: The system is linear and time invariant

1.  Causal, LP

2.  BIBO, LTI

3.  BIBO, Causal, LTI

4.  LP, LTI

4

BIBO, LTI

Explanation :
No Explanation available for this question

# The 4 point Discrete Fourier Transform (DFT) of a discrete time sequence {1, 0, 2, 3} is

1.  [0, - 2 + 2j, 2, - 2 - 2j]

2.  [2, 2 + 2j, 6, 2 - 2j]

3.  [6, 1 - 3j, 2, 1 + 3j]

4.  [6, - 1 + 3j, 0, - 1 - 3j]

4

[6, - 1 + 3j, 0, - 1 - 3j]

Explanation :
No Explanation available for this question

# Which of the following Boolean Expression correctly represents the relation between P, Q, R and M1

1.  M = (P OR Q) XOR R

2.  M1 = (P AND Q) XOR R

3.  M = (P NOR Q) XOR R

4.  M1= (P XOR Q) XOR R

4

M1= (P XOR Q) XOR R

Explanation :
No Explanation available for this question

# The feedback configuration and the pole-zero locations of G(s) = (s2 - 2s + 2)/(s2 + 2s + 2) are shown  below.  The  root  locus  for  negative  values  of  k,  i.e.  for  k 0, - ∞ < k < 0, has  breakaway/break  in  points  and  angle  of  departure  at  pole  P  (with  respect  to  the positive real axis) equal to

1.  ± √2 and 0º

2.  ± √2 and 45º

3.  ± √3 and 0º

4.  ± √3 and 45º

4

± √2 and 45º

Explanation :
No Explanation available for this question

# An LTI system having transfer function (s2 + 1)/(s2 + 2s + 1) and input x(t) = sin(t + 1)  is in steady state. The output is sampled at a rate  ω S rad/s to obtain the final output {y (k)}. Which of the following is true

1.  y(.) is zero for all sampling frequencies ωs

2.  y(.) is nonzero for all sampling frequencies ωs

3.  y(.) is nonzero for ωs > 2, but zero for ωs > 2

4.  y(.) is zero for ωs > 2 but nonzero for ωs > 2

4

y(.) is zero for all sampling frequencies ωs

Explanation :
No Explanation available for this question

# The unit step response of an under-damped second order system has steady state value of -2. Which one of the following transfer functions has these properties

1.  (-2.24)/(s2 + 2.59s + 1.12)

2.  (-3.82)/(s2 + 1.91s + 1.91)

3.  (-2.24)/(s2 - 2.59s + 1.12)

4.  (-3.82)/(s2 - 1.91s + 1.91)

4

(-3.82)/(s2 + 1.91s + 1.91)

Explanation :
No Explanation available for this question

# A discrete  random variable X  takes values  from 1  to 5 with probabilities as shown  in  the table. A student calculates the mean of X and 3.5 and her teacher calculates the variance of X as 1.5. Which of the following statements is true

1.  Both the student and the teacher are right

2.  Both the student and the teacher are wrong

3.  Both the student is wrong but the teacher is right

4.  The student is right but the teacher is wrong

4

Both the student and the teacher are wrong

Explanation :
No Explanation available for this question

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