Question 12 of 23beginner🔧 ApplyMCQ1 mark

If 20 compressions pass a point in 4 seconds, the frequency is

Exercise: Revise, Reflect, Refine | Q: 3 | (Page 22)
For More Understanding

Explanation

The frequency of a sound wave is defined as the number of density oscillations (or compressions) per unit time. According to the textbook, the formula is Frequency = number of oscillations / time taken. By substituting the given values (20 compressions in 4 seconds), we get Frequency = 20 / 4 = 5 Hz. Therefore, option (ii) is the correct answer.

Solution Steps

  1. Step 1: Identify the number of compressions (oscillations) = 20

  2. Step 2: Identify the time taken = 4 seconds

  3. Step 3: Apply the formula: Frequency = number of oscillations / time taken

  4. Step 4: Calculate Frequency = 20 / 4 = 5 Hz

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