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Physics · 2026 · 1 mark
CBSE 2026 · Region 1 · Set 1 · Q10
Four independent waves are expressed as (i) y_1= A_1 sin ω t (ii) y_2= A_2 sin 2 ω t (iii) y_3= A_3 cos ω t (iv) y_4= A_4 sin (ω t +π / 3) The…
Four independent waves are expressed as
(i)
$\displaystyle \mathrm{y}_{1}=\mathrm{A}_{1} \sin \omega \mathrm{t}$
(ii)
$\displaystyle \mathrm{y}_{2}=\mathrm{A}_{2} \sin 2 \omega \mathrm{t}$
(iii)
$\displaystyle \mathrm{y}_{3}=\mathrm{A}_{3} \cos \omega \mathrm{t}$
(iv)
$\displaystyle \mathrm{y}_{4}=\mathrm{A}_{4} \sin (\omega \mathrm{t}+\pi / 3)$ The interference between two of these waves is possible in
Official answer
(C)
(i), (iii) and (iv) only
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CBSE Class 12 Physics past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.