Question

Loudness depends on

• A. Frequency
• B. Amplitude
• C. Speed
• D. Wavelength

Hint:

Remember: \[ \boxed{\text{Loudness} \propto \text{Amplitude}^2} \] Also,
• Amplitude $\rightarrow$ Loudness
• Frequency $\rightarrow$ Pitch

Answer 1

The Correct Option is B

Concept: The loudness of a sound depends on the amplitude of the sound wave.

Step 1: Understand the effect of amplitude.

• Greater amplitude $\rightarrow$ Louder sound.
• Smaller amplitude $\rightarrow$ Softer sound.

Step 2: Analyse the options.

• Frequency determines the pitch.
• Amplitude determines the loudness. \checkmark
• Speed depends on the medium.
• Wavelength is related to frequency and speed.

Step 3: Final conclusion.
Hence, the loudness of sound depends on \[ \boxed{\text{Amplitude}.} \]