CUET · PHYSICS · PYQ PAPER 2023

The loss of strength of a signal while propagating through a medium is known as

A Noise
B Transducer
C Demodulation
D Attenuation

Verified Solution

Answer & Solution

Correct Answer

(D) Attenuation

Step-by-step Solution

Detailed explanation

Noise: Unwanted random signals that interfere with the original signal. Transducer: A device that converts energy from one form to another (like a microphone). Demodulation: The process of extracting original information from a carrier wave. D) Attenuation

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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List-I	List-II
(A) \(\|A\|=0\)	(I) A is a symmetric matrix
(B) \(\|A\| \neq 0\)	(II) A is a skew-symmetric matrix
(C) \(A^T=A\)	(III) A is a singular matrix
(D) \(A^T=-A\)	(IV) A is a non-singular matrix