Which factor deeides strength of a sound wave ?

Options

A. Amplitude
B. Frequency
C. Medium
D. Pitch

Answer

To determine the factor that decides the strength of a sound wave, we can analyze the different characteristics of sound waves. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Characteristics of Sound Waves
Sound waves are mechanical waves that require a medium (solid, liquid, or gas) to travel. The strength of a sound wave can be influenced by various factors.

**Hint:** Remember that sound needs a medium to travel, which is a fundamental property of sound waves.

### Step 2: Identify the Relevant Factors
The factors mentioned in the question are:
- Amplitude
- Frequency
- Medium
- Pitch

**Hint:** Consider how each factor relates to the energy and intensity of the sound wave.

### Step 3: Analyze Amplitude
Amplitude refers to the maximum displacement of molecules from their rest position in a sound wave. A higher amplitude means that the molecules are displaced more, which requires more energy. Therefore, a sound wave with a greater amplitude will be perceived as louder or stronger.

**Hint:** Think of amplitude as the height of the wave; taller waves carry more energy.

### Step 4: Analyze Frequency
Frequency is the number of oscillations (or cycles) that occur in one second. While frequency affects the pitch of the sound (how high or low it sounds), it does not directly determine the strength or intensity of the sound wave.

**Hint:** Frequency relates to the tone of the sound, not its loudness.

### Step 5: Analyze Medium
The medium through which sound travels can affect the speed and quality of sound but does not directly influence the strength of the sound wave itself.

**Hint:** Consider how sound travels differently in air, water, and solids.

### Step 6: Analyze Pitch
Pitch is related to frequency. A higher pitch corresponds to a higher frequency, but like frequency, it does not determine the strength of the sound wave.

**Hint:** Remember that pitch is about how we perceive sound, not how strong it is.

### Conclusion
From the analysis, the factor that decides the strength of a sound wave is **amplitude**. Higher amplitude means greater energy and thus a stronger sound.

**Final Answer:** The strength of a sound wave is determined by its **amplitude**.

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