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Radio Receivers - Engineering

Q1:

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

ANS:B - its operating temperature

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.