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Thermal noise is generated due to

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Thermal noise is generated due to

(a) Lossy coupling

(b) Lossless coupling

(c) Lossy & Lossless coupling

(d) None of the mentioned

I had been asked this question in an interview for internship.

Question is taken from Link Budget Analysis and Error Control in division Communication Link Analysis of Digital Communications

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The correct answer is (a) Lossy coupling

Easy explanation: Thermal noise occurs due to the thermal motion of electrons in all conductors. It occurs due to lossy coupling between an antenna and the receiver.

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