The greater the amplitude of a sound wave, the louder the sound. true or false.

True

Explanation:

Amplitude is defined as the degree of displacement of a wave from its mean value. In terms of Sound waves, amplitude of sound is experienced as the loudness of sound or the extent to which particles of air are displaced. A greater displacement therefore means an louder decibel of sound.

iron would move it is magnetic there is a mag field around the current in the wire