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Your cell phone contains an oscillator. This is a circuit which when fed direct current converts it into ultrahigh frequency sine waves, which are then modulated by an encoded version of the audio signal from the phone's mic unit.


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For any battery which works via electrochemical reactions, the voltage output of the battery will be the same regardless of its size as long as the chemistry is the same. However, the current output of the battery depends on the square area of the surfaces upon which the chemistry is taking place. Small surfaces, as in small batteries, means small amounts of ...


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