Act_18 - Name _ Section _ Period 18 Activity Sheet:...

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69 Name ____________________________ Section _______________________ Period 18 Activity Sheet: Information Transfer Activity 18.1: Information Transfer Using Electrical Energy a) Loudspeakers 1) Briefly connect the loudspeaker on your table to a 1.5 volt battery. Place your hand on the speaker as someone quickly connects and disconnects the battery. What do you feel? What happens to the loudspeaker cone as you connect and disconnect the battery? 2) What makes the loudspeaker cone move? b) Microphones 3) How is sound transferred by a microphone? 4) How is a microphone similar to loudspeaker? How do they differ? 1) Your instructor will demonstrate a microphone connected to an oscilloscope. Draw or describe the pattern you see on the oscilloscope screen when the microphone is not in use. 2) What happens to the pattern on the screen when someone speaks into the microphone?
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70 c) Building a loudspeaker 1) Cut a piece of wire about 3 meters long. Wrap the wire around the top half of the bolt,
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Act_18 - Name _ Section _ Period 18 Activity Sheet:...

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