Resonance results in:

Resonance results in:

• A. A quieter sound
• B. A higher pitch
• C. A lower pitch
• D. A louder sound

Answer: (D)

When a vibrating object is driven at its natural frequency, resonance makes the oscillations grow in size because energy is transferred most efficiently into the motion at that frequency. That bigger vibration means more energy is radiated as sound, so the sound becomes louder. The pitch, which is how high or low the sound is, depends on how fast the object vibrates (its frequency), not on how large the vibrations are, so resonance doesn’t inherently raise or lower the pitch. So resonance results in a louder sound. The options suggesting a quieter sound or a change in pitch don’t match what resonance does in this context.

When a vibrating object is driven at its natural frequency, resonance makes the oscillations grow in size because energy is transferred most efficiently into the motion at that frequency. That bigger vibration means more energy is radiated as sound, so the sound becomes louder. The pitch, which is how high or low the sound is, depends on how fast the object vibrates (its frequency), not on how large the vibrations are, so resonance doesn’t inherently raise or lower the pitch. So resonance results in a louder sound. The options suggesting a quieter sound or a change in pitch don’t match what resonance does in this context.