how a phone works
...e company connect with two wires that go from the other persons phone to the phone company. The two phones share current by being connected by parallel circuit. In the parallel circuit, the current is shared by two devices (the telephones), and they all have the same voltage drop. The way the current is shared is dependent upon the resistances. The device with less resistance receives more current and the devices with more resistance receives less current. The total current that passes through the telephones always remains the same, yet the individual current of both telephones fluctuates. When you talk through the microphone on the telephone, this makes the amount of current and resistance fluctuate between the two phones. The fluctuating current allows the telephones to produce sound. Since the current flowing is extremely small, a semiconductor chip containing all of the transistors, resistors, and capacitors form to amplify the current. When you are not using the telephone, and it is hung up the microphone and the speaker from the two telephone wires are disconnected. It connects with another component of the telephone to the wires. This is the bell or “ringer”. This responds to the alternating current sent through the two telephone wires to the phone when a call is coming in. Th...