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Q.

Is it true that in radios the electric energy is directly transformed into sound energy?


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a

True

b

False 

answer is B.

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Detailed Solution

The above statement is false.
●       In radio, an electric signal is sent to the speaker.
●       In the speaker, the electrical energy changes the position/vibration of the diaphragm, which can also be called kinetic energy.
●       This vibration will create sound, so kinetic energy is transformed into sound energy.
The correct statement would be in the radio, electric energy is first transformed into kinetic energy, and this kinetic energy is transformed into sound energy.
 
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