The Fourier transform of a conjugate symmetric function is always  

1.  imaginary

2.  conjugate anti-symmetric

3.  real

4.  conjugate symmetric

View Answer  
4
Correct Answer :

real


Explanation :
No Explanation available for this question

Consider the network graph shown in the figure. Which one of the following is NOT a 'tree' of this graph

1.  

2.  

3.  

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question

The equivalent  inductance measured between  the  terminals 1 and 2  for  the circuit shown in the figure is

1.  L1 + L2 + M

2.  L1 + L2 - M

3.  L1 + L2 + 2M

4.  L1 + L2 - 2M

View Answer  
4
Correct Answer :

L1 + L2 - 2M


Explanation :
No Explanation available for this question

The gain margin for the system with open-loop transfer function G (s) H (z) = (2(1 + z))/s2, is

1.  ∞

2.   0

3.   1

4.   -∞

View Answer  
4
Correct Answer :

-∞


Explanation :
No Explanation available for this question

The circuit shown in the Figure, with R = (1/3) , L = (1/4) H, C = 3F has input voltage  v(t)= sin 2t. The resulting current i(t) is

1.  5 sin (2t + 53.1°)

2.  5 sin (2t - 53.1°)

3.   25 sin (2t + 53.1°)

4.  25 sin (2t - 53.1°)

View Answer  
4
Correct Answer :

5 sin (2t + 53.1°)


Explanation :
No Explanation available for this question

Given the G (s) H (z) = K/(s(s + 1)(s + 3)), the point of intersection of the asymptotes of the root loci with the real axis is

1.  -4

2.  1.33

3.   -1.33

4.  4

View Answer  
4
Correct Answer :

-1.33


Explanation :
No Explanation available for this question

For the circuit shown in the Figure, the time constant RC = 1 ms. The input voltage is vi(t)= √(2) sin 103t.The output voltage v0 (t) is equal to

1.  sin (103t - 45°)

2.  sin (103t + 45°)

3.  sin (103t - 53°)

4.  sin (103t + 53°)

View Answer  
4
Correct Answer :

sin (103t - 45°)


Explanation :
No Explanation available for this question

In  a  PCM  system,  if  the  code  word  length  is  increased  from  6  to  8  bits,  the  signal  to quantization noise ratio improves by the factor

1.  8/6

2.   12

3.   16

4.   8

View Answer  
4
Correct Answer :

16


Explanation :
No Explanation available for this question

For the R-L circuit shown in the Figure, the input voltage vi (t) = u(t).The current i(t) is

1.  

2.  

3.  

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question

An  AM  signal  is  detected  using  an  envelope  detector.  The  carrier  frequency  and modulating signal  frequency are 1 MHz and 2 kHz  respectively. An appropriate value  for the time constant of the envelope detector is

1.  500 μsec

2.  20 μsec

3.  0.2 μsec

4.  1 μsec

View Answer  
4
Correct Answer :

20 μsec


Explanation :
No Explanation available for this question
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