Question 43
Work, Energy and PowerA device that converts sound energy into electrical energy is
- A.the horn of a motor car
- B.an A.C. generator
- C.a microphone
- D.the telephone ear-piece
- E.a loudspeaker.
Show the answer and explanation
Answer: C (a microphone)
Explanation
A microphone turns sound vibrations into electrical signals. A loudspeaker or ear-piece does the reverse.