Radio Test - 1

The correct answer is All of the above

Key Points

• The Operations of All India Radio began formally in 1936, as a government organization, with clear objectives to inform, educate and entertain the masses.
• Inform: 
• Let us take an example. The water supply department makes an announcement on the radio that there will be no water supply in our village or town the next day morning. So we get ready to face that situation.
• In example, we are given information. we would agree that this information is of great use.
• Educate: 
• we might have heard rural programs on agriculture on the radio. Experts who take part in that program may explain what precautions are to be taken for a crop during a particular season. we learn to do a particular agricultural practice using that information.
• The information can educate a farmer who has no formal education or training in agriculture.
• Entertainment: 
• For a majority of Indians in rural areas, radio is the only source of news and entertainment. Radio news can be heard anywhere using an inexpensive receiver. Even the most economically backward sections can afford to use the medium of radio.
• Radio is the best medium of entertainment. It provides healthy entertainment to the listeners.
• There is plenty of music of different types available to people.
• The popular types of music are classical, light classical, light, devotional, folk, and film music.

The correct answer is Guglielmo Marconi 

Key Points

• The first radio transmitter was invented by Guglielmo Marconi in 1894, at the age of 20.
• Initially, he could transmit signals only over short distances, but a year later he finally succeeded in sending signals over longer distances.
• In 1895, Italian Guglielmo Marconi succeeded in sending messages over long distances using the code of dots and dashes that Morse had developed.
• A transmitter is an electronic device used in telecommunications to produce radio waves in order to transmit or send data with the aid of an antenna.
• The transmitter is able to generate a radio frequency alternating current that is then applied to the antenna, which, in turn, radiates this as radio waves.

The correct answer is Bombay

Key Points

• In June 1923 the Radio Club of Bombay made the first-ever broadcast in the country.
• Music and discussions were the significant parts of the two- to three-hour daily broadcasts.
• Broadcasting in India actually began about 13 years before AIR came into existence.
• The Indian Broadcasting Company (IBC) came into being on July 23, 1927.
• The Indian Broadcasting Service was renamed All India Radio (AIR) in 1936.
• Radio broadcasting in India began as a private venture in 1923 and 1924 when three radio clubs were established in Bombay, Calcutta, and Madras.

The correct answer is A:3, B:1, C:2, D:4

Key Points

• AIR has expanded the scope of agriculture broadcast. It launched on 1 April 2004 a project called Kisan Vani to support the extension of agriculture.
• After the independence, AIR developed both in terms of quantity as well as quality. The major advancement was the online information service which is launched on 2 May 1996. 
• AIR launched the first-ever digital satellite home service on 27 February 2002 which uses the operation of the mobile uplink and downlink system.
• There are 14 radio stations in Bangalore. Amrutavarshini is the 5th radio station which is dedicated to Indian classical music on 26 January 2004

The correct answer is Frequency Modulation

Key Points Frequency Modulation:

• Frequency modulation or commonly referred to as FM is a common term, Today, Frequency modulation is used widely in radio communication and broadcasting.
• Frequency modulation is a technique or a process of encoding information on a particular signal (analog or digital) by varying the carrier wave frequency in accordance with the frequency of the modulating signal.
• As we know, a modulating signal is nothing but information or message that has to be transmitted after being converted into an electronic signal.
• In frequency modulation, a carrier signal is modulated by the input signal.
• However, in the case of FM, the amplitude of the modulated signal is kept or it remains constant.

Applications of Frequency Modulation

• It is mostly used in radio broadcasting. It offers a great advantage in radio transmission as it has a larger signal-to-noise ratio.
• Its uses are also found in radar, telemetry, seismic prospecting and in EEG, different radio systems, music synthesis as well as in video-transmission instruments.

The correct answer is All of the above

Key Points

• In a radio studio, microphones are required to record the human voice.
• Uni-directional- Microphones can pick up the sound only from one direction. This type of microphone is typically used by announcers and newsreaders.
• Bi-directional - The microphone, can pick up the sound from both sides. Such kind of a microphone is used during an interview.
• Omnidirectional - The microphone picks up the sound from all directions. It is generally used during a radio discussion or drama.
• They're also prone to audio feedback, so it's best not to use them in environments that get too noisy.

The correct answer is A:3, B:1, C:2, D:4

Key Points

• 10 January 1933 -  Introduction of Phone-in-programme at AIR Delhi
• 18 May 1988 -The color television was introduced in India in 1982. The Indian population receives the Doordarshan programs through 1400 transmitters.
•  1 April 1994  - Sky radio became operational. The word “Aakashwani” meant the voice from the sky. In Sanskrit, it means celestial announcement.
• 15 January 1995 -  Inauguration of radio paging service. Radio paging still plays an important role and it may include applications in health care, security, and public transport.

The correct answer is Ham radio

Key Points

• Amateur radio, often known as Ham radio, is a kind of radio communication in which supporters are given permission to communicate on a variety of bands throughout the radio frequency spectrum.
• It also provides public service assistance.
• Amateurs use a variety of modes, including Morse code and low-frequency experimental radio.
• The word “Ham” was coined in 1908.
• The First Annual Official Wireless Blue Book of the Wireless Association of America identified 89 amateur radio stations in 1909.

The correct answer is All of the above

Key PointsSome of the common terms used in the medium of radio

• Audience: The group of people whom radio or media reaches for a particular program.
• Listener/s: A person or a group of people who form the target audience of radio programs.
• Tuning in to the radio: You have to switch on your radio and tune into the station you want to listen to.
• Broadcaster: a person who presents or announces programs over the radio for the public.
• Broadcasting: any communication or transmission of any message or signal to the public through electronic apparatus.
• Live broadcast: It means a program being broadcast directly without any pre-recording or the sounds made at the moment of broadcast.
• Pre-recorded program: The program is recorded on magnetic tape, phonographic discs, or compact discs for broadcasting later.
• Script: The written copy of the words to be spoken during a radio program.

The correct answer is A:4, B:3, C:1, D:2

Key Points

• October 3, 1957: Vividh Bharati Services started.
• Vividh Bharati provides entertainment for nearly 15-17 hours a day. A few of the old popular shows were Hawa Mahal, Sangeet Sarita, etc.
• November 1999: AIR launched a daily Malayalam Service for the Gulf Region
• It consists of 10 minutes. News Bulletins at 2315 hrs. it was followed by a 5 minutes Commentary on a topical issue.
• November 12, 2001:  This day was declared as The Public Service Broadcasting day to commemorate Gandhiji's visit to AIR.
• Museum of Radio and Doordarshan inaugurated.
• December 16, 2004: Prime Minister Dr. Manmohan Singh inaugurated the DTH Service of AIR & Doordarshan.
• 12 AIR channels in different regional languages from various state capitals are made available countrywide through the KU Band on the DTH platform of Prasar Bharati.