# The Nyquist sampling rate for the signal g(t) = 10 cos(50 π t) cos2(150 π t) when t in seconds is,

1.  150 samples/second

2.  200 samples/second

3.  300 samples/second

4.  350 samples/second

4

350 samples/second

Explanation :
No Explanation available for this question

# For the identify the dual form is

1.

2.

3.

4.

5.  8

6.  24

7.  12

8.  35

8

35

Explanation :
No Explanation available for this question

# The entropy of a message source generating four messages with probabilities 0.5, 0.25, 0.125 and 0.125 is

1.   1.0 bit/message

2.  1.75 bit/message

3.  3.32 bit/message

4.  5.93 bit/message

4

1.75 bit/message

Explanation :
No Explanation available for this question

# If the gain of the open-loop system is double the gain margin

1.   is not affected

2.  gets doubled

3.  becomes half

4.  become one-fourth

4

becomes half

Explanation :
No Explanation available for this question

# The block diagram shown below represents

1.  modulo-3 ripple counter

2.  modulo-5 ripple counter

3.  modulo-7 ripple counter

4.  modulo-7 synchronous counter

4

modulo-7 ripple counter

Explanation :
No Explanation available for this question

# A closed-loop system is shown below. When will the system be very much under damped

1.   T1

2.  T1 = T2

3.  T1>T2

4.  None of the above

5.  28

6.  32

7.  40

8.  64

8

40

Explanation :
No Explanation available for this question

# The circuit shown in the figure below is

2.  a sub tractor

3.  parity generator

4.  comparator

4

parity generator

Explanation :
No Explanation available for this question

# In a communication system, each message (1 or 0) is transmissed three times in order to reduce the probability of error. The detection is based on the majority rule at the receiver. If Pc is the probability of bit error, the probability of error for this communication system will be

1.

2.

3.

4.

5.  1 liter

6.  7 liters

7.  31 liters

8.  41 liters

8

31 liters

Explanation :
No Explanation available for this question

# As the modulation index of an FM signal with sinusoidal modulation is increased from zero top twice, the power in the carrier component will

1.  increase continuously

2.  decreases continuously

3.  first increase, becomes zero and then decrease

4.  first decrease, become zero and then increase

4

decreases continuously

Explanation :
No Explanation available for this question

1.

2.

3.

4.

4