Electronics and Communication Engineering - Radio Receivers - Discussion

Discussion Forum : Radio Receivers - Section 1 (Q.No. 1)
1.
The noise generated by a resistor depends upon
its resistance value
its operating temperature
both its resistance value and operating temperature
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
11 comments Page 1 of 2.

Daimon said:   1 year ago
Generally, noise is expressed in power.

Hence P=kTB is the most appropriate formula to base with.
It states that noise is proportional to temperature and bandwidth of operation (not the operation frequency).
In addition, the value of resistance is negligible.

RAJIVE said:   6 years ago
Also on frequency of operation.

Bhupender said:   7 years ago
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.

Shaik ejaz said:   7 years ago
If the resistance is high then heat dissipation also high. High heat will effect the signal also signal strength will be decreases.

Naresh said:   7 years ago
V = square root (4 kTBR).

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

Prathyusha Chowdary musunuri said:   8 years ago
Noise is directly proportional to the bandwidth of a signal and absolute temperature.

Cslohumi said:   8 years ago
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).

Arun kumar said:   9 years ago
Power losses is directly proportional to temperature increases.

Mad said:   9 years ago
As temperature increases energy of electrons increases, then random motion of electrons increases causing noise.

Naveen said:   9 years ago
Because it has linear characteristics if noise created it would not effect resistor value.


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