GK
BASIC GENERAL KNOWLEDGE
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 Question 
 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
 
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 Microphone is used to convert 
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  sound waves into magnetic currents 
 
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  electrical energy into sound waves 
 
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  sound waves into light rays 
 
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  sound waves into electrical energy 
 
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 Explanation: 
Detailed explanation-1: -Most microphones use either an electromagnetic or an electrostatic technique to convert sound waves into electrical signals. The dynamic microphone is constructed with a small magnet that oscillates inside a coil attached to the diaphragm.
Detailed explanation-2: -Microphones convert acoustical energy (sound waves) into electrical energy (the audio signal).
Detailed explanation-3: -Piezoelectricity uses unique crystals to convert mechanical energy-in this case, sound wave energy-into electrical energy.
Detailed explanation-4: -Hence, the microphone converts electrical energy to sound energy.
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