What is Radio and How it works
What is Radio and its Working
A radio is a device for receiving and sending Speech or music over large areas by electromagnetic signals.
- Transmission: Information is sent out into the atmosphere from a Transmitting station. When someone speaks in the microphone at the radio station, sound waves are if converted into electrical fluctuating current. This current is converted into high frequency alternating current, which is allowed to pass in the transmitting antenna. The transmitting antenna produces radio waves with fluctuating amplitude. These waves are known as modulated carrier waves.
- Receiving: When the modulated carrier waves meet a receiving aerial, they generate fluctuating alternating current in it. This AC is converted into DC with the help of a rectifier. An earphone or a speaker is connected to the receiver. The DC energizes the electromagnet of the speaker and causes the diaphragm to vibrate. This produces the sound of same frequency as that at the radio station.
Note: Exceptions are students who are seriously engaged in their studies on their own, but such, unfortunately, are few. Another disadvantage is the place of work. Perhaps after school and you can get a job as a sales consultant, secretary or at best a customer service manager, that is, you will find a job that does not require special skills. Rarely at 17 years someone is taken to a major PR-agency, even to the position of “Assistant Assistant Leader.” There is only one way out: get established by acquaintance, but if the company rumors about it, you are unlikely to maintain good relations with colleagues. So, you graduate from the correspondence department of the university with work experience of 6 years, say, assistant manager. You have both “education” and work experience. Where to move next? If you have not been promoted in your company for this time, then it is unlikely that they will do it now. It is necessary to change the place of work. And where can you find a job with the “assistant manager” experience?