Noise In Communication Systems – 1 – 3

11. Dit is a unit of :

(a) Channel capacity
(b) Entropy
(c) Information
(d) Rate of information

12. The maximum possible value of entropy is :

(a) 1
(b) 6
(c) 10
(d) ∞

13. Which of the following filters is used only at higher frequency ?

(a) Half lattice
(b) Ladder
(c) Crystal gate
(d) Full lattice

14. Cosmic noise is caused by :

(a) Distant stars
(b) Lightning discharge
(c) Solar eruptions
(d) None of the above

15. Probability density function of thermal noise is :

(a) Poisson
(b) Binomial
(c) Gaussian
(d) None of the above

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