Question 41 : Neper is ________ decibel.
1. smaller than
2. larger than
3. equal to
4. exactly twice of
View Answer   Discuss with Members

Question 42 : Super heterodyne receivers needs an extra circuitry for frequency conversion.
1. True
2. False
3.
4.
View Answer   Discuss with Members

Question 43 : Which statement is true about emitter modulator amplifier for amplitude modulation?
1. operates in class A mode
2. operates in class C mode
3. operates in class B mode
4. operates in class D mode
View Answer   Discuss with Members

Question 44 : In communication system, redundancy ________
1. Helps to detect error
2. Helps to correct error
3. Reduces efficiency of communication
4. Helps to detect and correct error and also reduces efficiency
View Answer   Discuss with Members

Question 45 : Communication consists of electrical means of sending information only.
1. True
2. False
3.
4.
View Answer   Discuss with Members

Question 46 : What is the maximum transmission efficiency?
1. 67.88%
2. 33.33%
3. 73%
4. 54.03%
View Answer   Discuss with Members

Question 47 : Which statement is correct about ergodic process?
1. ensemble and time averages are different
2. ensemble and time averages are opposite to each other
3. ensemble and time averages are identical
4. ensemble average are exactly twice of time averages
View Answer   Discuss with Members

Question 48 : A ransom signal is defined as ergodic, if ________
1. all type of ensemble averages are interchangeable
2. all type of ensemble averages are not interchangeable
3. all type of ensemble averages are constant
4. all type of ensemble averages are double than their previous value
View Answer   Discuss with Members

Question 49 : A signal is called ergodic if all type of ensemble averages are constant.
1. True
2. False
3.
4.
View Answer   Discuss with Members

Question 50 : In TV transmission, sound signal is ________ modulated.
1. Phase
2. Pulse
3. Frequency
4. Amplitude
View Answer   Discuss with Members