Choose the correct option for the following Assertion (A) and Reason (R).

Question

G1 Physics · Accepted Answer

For a small-amplitude sound wave, Δp = v²Δρ. Since v² is a positive constant, Δp and Δρ always have the same sign and reach their maxima and minima together. Thus pressure and density variations are in phase. Both Assertion and Reason are true, and the Reason correctly explains the Assertion. Correct option: A.