The peak-to-peak input to an 8-bit PCM coder is 2 volts.The signal power-to-quantization noise  power ratio (in dB) for an input of 0.5 cos(ωmt) is

1.  47.8

2.  49.8

3.  95.6

4.  99.6

View Answer  
4
Correct Answer :

95.6


Explanation :
No Explanation available for this question

The input to a matched filter is given by  Otherwise the peak amplitude of the filter output is

1.  10Volts

2.  5 volts

3.  10 millivolts

4.  5 millivolts

View Answer  
4
Correct Answer :

10Volts


Explanation :
No Explanation available for this question

In a twin-wire transmission line in air ,the adjacent voltage maxima are at 12.5cm and  27.5cm.The operating frequency is

1.  300MHz

2.  1GHz

3.  2GHz

4.  6.28 GHz

View Answer  
4
Correct Answer :

1GHz


Explanation :
No Explanation available for this question

A transmitting antenna radiates 251W isotropically.A receiving antenna,located 100m away  from the transmitting  antenna,has an effective aperature of 500cm2.The total received by the antenna is

1.   10µW

2.  1µW

3.  20µW

4.  100µW

View Answer  
4
Correct Answer :

100µW


Explanation :
No Explanation available for this question

A plane wave propagating through a medium[εr=8,vr=2 and σ=0]has its electrical field given by The wave impedance ,in ohms is

1.  377

2.  198.5∏ 1800

3.  182.9∏140

4.  133.3

View Answer  
4
Correct Answer :

377


Explanation :
No Explanation available for this question

The ripple counter shown in the given figure is works as a

1.   mod-3up counter  

2.  mod-5 up counter

3.  mod-3down counter

4.  mod-5 down counte

View Answer  
4
Correct Answer :

mod-5 down counte


Explanation :
No Explanation available for this question

If CS=A15A14A13 is used as the chip select logic of a 4K RAM in an 8085 system,then its memory range will be

1.   3000H-3 FFF H

2.  7000H-7 FFF H

3.  5000H-5 FFF H  and 6000H-6 FFF H

4.  6000H-6 FFF H  and 7000H-7 FFF H

View Answer  
4
Correct Answer :

6000H-6 FFF H  and 7000H-7 FFF H


Explanation :
No Explanation available for this question

Of the closed-loop transfer function T(s) of a unity negative feedback system is given byT(s) =  (an-1+an) / (sn+a1sn-1+…+an-1s+an) ,then the steady state error for a unit ramp input is 

1.  an / an-1

2.  an / an-2

3.  an-2/ an-2

4.  zero

View Answer  
4
Correct Answer :

zero


Explanation :
No Explanation available for this question

Consider the points s1 = -3+j4 and s2=-3-j2 in the s-plane.Then,for a system with the open- loop transfer function G(s) H(s)=K/(s+1)4

1.   s1 is on the root locus,but not s2

2.  s2 is on the root locus,but not s1

3.  both s1 and s2 are on the root locus

4.  neither s1 nor s2 on the root locus

View Answer  
4
Correct Answer :

neither s1 nor s2 on the root locus


Explanation :
No Explanation available for this question

The Thevenin equivalent voltage VTH appearing between the terminals A and B of the network shown    in the given figure is given by

1.   j16(3-j4)   

2.  j16(3+j4)

3.  16(3+j4)

4.  16(3-j4)

View Answer  
4
Correct Answer :

16(3-j4)


Explanation :
No Explanation available for this question
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