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Work, Power And Energy — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceWork, Power And Energy1 Mark
MCQ
A microphone converts:
  • A
    Electrical energy into sound energy in ordinary telephone.
  • B
    Microwave energy into sound energy in a mobile phone.
  • C
    Sound energy into mechanical energy in a stereo system.
  • ✓
    Sound energy into electrical energy in public address system.
✓

Answer

Correct option: D.
Sound energy into electrical energy in public address system.
A microphone converts sound energy into electrical energy in public address systems.

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