Question

A plane progressive wave is given by y = 2 cos 2pi (330t - x) m. The frequency of the wave is:} 
 

• A. 165 Hz
• B. 330 Hz
• C. 660 Hz
• D. 340 Hz

Hint:

In the wave equation \( y = A \cos 2\pi (ft - \frac{x}{\lambda}) \), \( f \) represents the frequency of the wave.

Answer 1

The Correct Option is B

Step 1: {Extracting frequency from wave equation}
The standard equation for a plane progressive wave is:
\[y = A \cos 2\pi (ft - \frac{x}{\lambda})\]
Upon comparison with the provided equation:
\[y = 2 \cos 2\pi (330t - x)\]
The frequency \( f \) is determined to be 330 Hz.