Analog Communication - Electronic Engineering (MCQ) questions & answers for Q. 13827

Q.  Noise power at the resistor is affected by the value of the resistor as
- Published on 15 Oct 15

a. Directly proportional to the value of the resistor
b. Inversely proportional to the value of the resistor
c. Unaffected by the value of the resistor
d. Becomes half as the resistance value is doubled

ANSWER: Unaffected by the value of the resistor
 
The Noise power is given by
Pn = KTB
Where
K = 1.381 × 10-23 J/K, joules per Kelvin, the Boltzmann constant
B is the bandwidth at which the power Pn is delivered.
T noise temperature,
which is unaffected by change in the value of the resistor.

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