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: {Identifying the frequency from the wave equation}
The general form of a plane progressive wave is: \[ y = A \cos 2\pi (ft - \frac{x}{\lambda}) \] Comparing with the given equation: \[ y = 2 \cos 2\pi (330t - x) \] The frequency \( f \) is 330 Hz.