JEE Mains · Physics · STD 11 - 14. waves and sound
A plane progressive wave is given by \(y=2 \cos 2 \pi(330 t-x) m\). The frequency of the wave is _______.
- A \(165 \mathrm{~Hz}\)
- B \(330 \mathrm{~Hz}\)
- C \(660 \mathrm{~Hz}\)
- D \(340 \mathrm{~Hz}\)
Answer & Solution
Correct Answer
(B) \(330 \mathrm{~Hz}\)
Step-by-step Solution
Detailed explanation
\(y=2 \cos 2 \pi(330 t-x) m\) \(y=A \cos (\omega t-k x)\) \(\text { by comparing } \omega=2 \pi \times 330\) \(2 \pi f=2 \pi \times 330\) \(f=330\)
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