Emma sings into a microphone. The sound is transferred from the microphone to a loudspeaker that is plugged into the wall. Her voice comes out of the loudspeaker and sounds much louder than before.

Question

In this system, sound energy is being transformed into _______ energy and then back into _______ energy.
A.
electrical; sound
B.
mechanical; sound
C.
electrical; mechanical
D.
heat; sound

Answer 1

In this system, sound energy is being transformed into A. electrical; sound energy.

Initially, Emma's voice (sound energy) is captured by the microphone and converted into electrical energy. Then, that electrical energy is converted back into sound energy by the loudspeaker, amplifying her voice.