CUET · PHYSICS · PYQ PAPER 2025

In reference to the radio waves, choose the incorrect statements:
(A) Radio waves are the longest wavelength electromagnetic waves.
(B) Radio waves are deviated by electric and magnetic fields.
(C) Radio waves are diffracted easily.
(D) Radio waves are not electromagnetic waves.
Choose the correct answer from the options given below:

A (A) and (D) only
B (C) and (D) only
C (A) and (C) only
D (B) and (D) only

Verified Solution

Answer & Solution

Correct Answer

(D) (B) and (D) only

Step-by-step Solution

Detailed explanation

Statements (B) and (D) are incorrect. Radio waves, being uncharged electromagnetic waves, are not deviated by electric or magnetic fields. Furthermore, they are a fundamental part of the electromagnetic spectrum, possessing the longest wavelengths and lowest frequencies. The…

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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