Electronics and Communication Engineering - Radio Receivers - Discussion

Discussion :: Radio Receivers - Section 1 (Q.No.1)

1. 

The noise generated by a resistor depends upon

[A]. its resistance value
[B]. its operating temperature
[C]. both its resistance value and operating temperature
[D]. none of the above

Answer: Option B

Explanation:

No answer description available for this question.

Giri Prasath said: (Nov 14, 2014)  
Temperature is directly proportional to the Noise created by resistor.

Naveen said: (Jan 4, 2015)  
Because it has linear characteristics if noise created it would not effect resistor value.

Mad said: (Feb 4, 2015)  
As temperature increases energy of electrons increases, then random motion of electrons increases causing noise.

Arun Kumar said: (Dec 1, 2015)  
Power losses is directly proportional to temperature increases.

Cslohumi said: (May 6, 2016)  
Noise generated by resistors results from the motion of electrons within the resistor.

The noise power is proportional to the bandwidth.
Then, V = square root (4 kTBR).

Prathyusha Chowdary Musunuri said: (Jul 14, 2016)  
Noise is directly proportional to the bandwidth of a signal and absolute temperature.

Naresh said: (Mar 16, 2017)  
V = square root (4 kTBR).

So, noise proportional to both R, T, B.

Shaik Ejaz said: (May 2, 2017)  
If the resistance is high then heat dissipation also high. High heat will effect the signal also signal strength will be decreases.

Bhupender said: (May 5, 2017)  
I agree @Naresh.

Noise should depend on resistance value as well as evident from the formula. Otherwise, there will be no difference between metals and non-metals.

Rajive said: (Apr 16, 2018)  
Also on frequency of operation.

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