Why two Parallel resistor is better than equivalent single resistor for noise reduction ?

 

As this is Homework Help, not Homework Done For You, you need to make YOUR best attempt to answer your questions, instead of expecting strangers on the Internet to spoon feed them to you.

So try to calculate the noise in a single resistor R and then the noise in a resistor 2R and then the noise of two resistors in parallel.

 

Why two Parallel resistor is better than equivalent single resistor for noise reduction ?

What makes you think that?

 

What makes you think that?

“déjà vu all over again”

 

There also needs to be a specification for how much Noise is considered acceptable as a goal to shoot for.

And, what type of Resistor will be used, this will have a huge effect on Noise.
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As this is Homework Help, not Homework Done For You, you need to make YOUR best attempt to answer your questions, instead of expecting strangers on the Internet to spoon feed them to you.

So try to calculate the noise in a single resistor R and then the noise in a resistor 2R and then the noise of two resistors in parallel.

I dont put entire thing here i only ask for general perspective because i see 2 SMD parallel vishey resistor used instead equivalent single resistor, it due to heat develop by smd ? Can we replace them with single resistor hole type with heat sink attach to it or there is some thing special in two parallel use that we cant replace them wit single resistor.

 

How can we know why whomever designed whatever it is you are looking at chose to use two parallel resistors. Maybe it was heat dissipation. Maybe it was because they stock the resistors they used and would have had to order the resistors if they used the equivalent. Who knows?