ASVAB Practice Test

A device that converts sound waves to electric current is a?

1. Condenser

2. Microphone

3. Transistor

4. Tuner

The correct answer is: Condenser

The correct choice is a microphone, as it is specifically designed to convert sound waves into an electric current. When sound waves enter the microphone, they cause a diaphragm to vibrate. These vibrations are then transformed into an electrical signal, which can be amplified or recorded. While a condenser is related to microphones, particularly condenser microphones, it's important to note that a condenser itself is an electronic component that stores electrical energy in an electric field. It does not inherently perform the function of converting sound waves to electric current. A transistor, meanwhile, is a semiconductor device that can amplify or switch electronic signals but does not directly convert sound waves. Lastly, a tuner is used for selecting radio frequencies and does not play a role in the conversion of sound waves to electric current. Overall, the microphone's primary function is to facilitate the transition from acoustic energy (sound) into electrical energy, making it the most accurate answer in this context.