Noise factor and noise figure

Q.  Noise Factor(F) and Noise Figure(NF) are related as
- Published on 15 Oct 15

a. NF = 10 log10(F)
b. F = 10 log10(NF)
c. NF = 10 (F)
d. F = 10 (NF)

ANSWER: NF = 10 log10(F)
 
Noise figure (NF) and noise factor (F) signify the degradation of the signal-to-noise ratio (SNR) for any system due to components in a radio frequency (RF) signal . They give the performance of the system.The noise factor of a system is defined as the ratio of output noise power (Pno) to input noise power (Pni):
F = Pno/ Pni, at standard room temperature 290K
Noise Factor when expressed in decibels, it is called noise figure.
i.e. NF = 10 log10(F)

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