What basically is the cause of thermal noise?
Answer:
When electron pass in a conductive material, they pass through atoms. In any given temperature atoms of the conductor vibrate, as the temperature rises they vibrate more. This vibration causes the path of the electrons to be bumpy as they have to pass these vibrating atoms. This causes the electrons to randomly bounce back and forth and this results in Thermal Noise.
heat of course! heat reacting with air causing it to expand.
caused by the noise produced as the electrons move thrugh a medium such as carbon resistors (no, they are not all the same). most noisy is carbon comp. least noisey is "bulk metal" and there are seven types.
the heat comming from its source thats the thermal noise.
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