# 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

4

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

4

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.

4

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.

4

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

4

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

4

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

4

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

4

(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

4

a2Sg(ω) and a2Pg

Explanation :
No Explanation available for this question

1.  S1

2.  S2

3.  S3

4.  S4

4