In the figure, the LED

1.  emits light when both S1 and S2 are closed

2.  emits light when both S1 and S2 are open

3.  emits light when only S1 or S2 is closed

4.  does not emit light, irrespective of the switch positions

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4
Correct Answer :

does not emit light, irrespective of the switch positions


Explanation :
No Explanation available for this question

A feedback control system in the figure is stable

1.  for all K ≥ 0

2.  only if K ≥ 0

3.  only if 0 ≤ K < 1

4.  only if 0 ≤ K ≤ 1

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4
Correct Answer :

only if 0 ≤ K < 1


Explanation :
No Explanation available for this question

In the TTL circuit in the figure,S2 to S0 are select lines and X7 to X0 are input lines.S0 and X0 are  LSBs. The output Y is

1.  Indeterminate

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
No Explanation available for this question

The digital block in the figure, realized using two positive edge triggered D-flip-flops.Assume that for    t < t0 ,Q1=Q2=0.The circuit in the digital block is given by

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
No Explanation available for this question

A video transmission system transmits 625 picture frames per second.Each frame consists of a    400x400 pixel.The data rate of the system is

1.  16 Mbps

2.  100 Mbps

3.  600 Mbps

4.  6.4 Gbps

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4
Correct Answer :

600 Mbps


Explanation :
No Explanation available for this question

The Nyquist sampling interval,for the signal Sinc(700t)+Sin c(500t) is

1.  1/350 sec

2.  π/350 sec

3.  1/700 sec

4.  π/175 sec

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4
Correct Answer :

1/700 sec


Explanation :
No Explanation available for this question

In the DRAM cell in the figure is the Vt of the NMOSFET is 1V.For the following three combinations of WL and BL voltages

1.  5V;3V;7V

2.  4V;3V;4V

3.  5V;5V;5V

4.  4V;4V;4V

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4
Correct Answer :

Explanation :
No Explanation available for this question

During transmission over a communication channel ,bit errors occur independently with probability  P.If a block of n  bits is transmitted, the probability of at most one bit error  is equal to

1.  1-(1-p)n

2.  p+(n-1)(1-p)

3.  np(1-p)n-1

4.  (1-p)n+np(1-p)n-1

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4
Correct Answer :

(1-p)n+np(1-p)n-1


Explanation :
No Explanation available for this question

The PSD and the power of a signal g(t) are, respectively,Sg(ω) and Pg.The PSD and the power of the signal ag(t) are, respectively

1.  a2Sg(ω) and a2Pg

2.  a2Sg(ω) and aPg

3.  aSg(ω) and a2Pg

4.  aSg(ω) and aPg

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4
Correct Answer :

a2Sg(ω) and a2Pg


Explanation :
No Explanation available for this question

The impulse response functions of four linear systems S1, S2, S3 ,S4  are given respectively by h1(t)=1 h2(t)=U(t) h3(t)= U(t)/(t+1) h3(t)=e-3t U(t) where U(t) is the unit step function. Which of these systems is time invariant,casual and stable   

1.  S1

2.  S2

3.  S3

4.  S4

View Answer  
4
Correct Answer :

S4


Explanation :
No Explanation available for this question
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