Question

A sound wave has a frequency of $ 440 \, \text{Hz} $. What is its time period?

• A. \( 0.00227 \, \text{s} \)
• B. \( 0.002 \, \text{s} \)
• C. \( 0.0025 \, \text{s} \)
• D. \( 0.004 \, \text{s} \)

Hint:

Remember: The time period is the reciprocal of the frequency, \( T = \frac{1}{f} \).

Answer 1

The Correct Option is A

Step 1: Use the formula for the time period of a wave
The time period \( T \) of a wave is the reciprocal of its frequency \( f \): \[ T = \frac{1}{f} \]
Step 2: Substitute the given frequency
Given: - Frequency \( f = 440 \, \text{Hz} \). Substitute this value into the formula: \[ T = \frac{1}{440} = 0.00227 \, \text{s} \]
Answer:
Therefore, the time period of the sound wave is \( 0.00227 \, \text{s} \). So, the correct answer is option (1).