Mobile and telephone technology

Mobile and telephone are one of the wonderful inventions of the scientists. The American scientist graham Bell invented it in 1876.With the help of mobile, one can talk to another person. It has become one of the necessities of life. People feel great inconvenience without the telephone.
Telephone works based on electricity. Wires connect telephone Set. These wires carry the sound with the help electric current. The telephone set has two parts i.e. transmitter and recover. We can speak with the help of transmitter and hear with the help of receiver. Nowadays we have also automatic telephone exchange system. When one dials the number of a person, to whom he wants to speak he can get the instant connection. One needs to ask the exchange center to give the connection,
Telephone is very useful for us. We can talk to a person without going to his place. it is useful for very busy people. it saves time. One person can talk to other by sitting in the corner of the room. if any crime is committed, the police can be informed at once. if there is any accident, we can ring the hospital authority for an ambulance. if there is an out break of fire, the fire bridge can be informed immediately. We can put out the fire and save the life and property. There can be the transaction of business with help of telephone in a short time. In this way, many works can be done sitting at the corner of room.
There is an improvement in the telephone system. In the past, one has to ask central exchange to give connection in order to talk to a person in other district, zone or even country. However, nowadays, we can have direct connection. a person from Nepal can contact with the people from different parts of the world. it has narrowed down the whole world.
Therefore, telephone is a boon to the humankind. It has changed our lives. it should be used properly. However, nowadays there is an improved version of the ground phone, which can be termed as a mobile phone, it is one of the latest gifts of science to man.