DAILY CURRENT AFFAIRS IAS | UPSC Prelims and Mains Exam – 1st May 2023
Archives (PRELIMS & MAINS Focus) FM transmitters Syllabus Prelims –Science and Technology Context: Prime Minister Narendra Modi recently launched 91 new 100-watt capacity FM transmitters. About Frequency Modulation (FM):- It is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave. In analogue FM (radio broadcasting), the instantaneous frequency deviation has a functional relation to the modulating signal amplitude. frequency deviation – the difference between the frequency of the carrier and its centre frequency. Digital data can be encoded and transmitted with a type of FM known as frequency-shift keying (FSK), in which the instantaneous frequency of the carrier is shifted among a set of frequencies. FM transmitters:- IMAGE SOURCE: FM Transmitter Block Diagram with Explanation (electronicsandcommunications.com) It is a low-power FM radio transmitter that broadcasts a signal from a portable audio device (such as an MP3 player) to a standard FM radio. Most of these transmitters plug into the device’s headphone jack and then broadcast the signal over an FM broadcast band frequeny so that it can be picked up by any nearby radio. This allows portable audio devices to make use of the louder or better sound quality of a home audio system or car stereo without requiring a wired connection. Being low-powered, most transmitters typically have a short range of 100-300 feet (30–91 metres), depending on the quality of the receiver, obstructions and elevation. FM vs AM:- IMAGE SOURCE: Research – VANXFILMS OFFICIAL WEBSITE (weebly.com) Radio signals are broadcast using AM (or Amplitude Modulation) and FM (or Frequency Modulation). Electromagnetic waves are used to transfer data in both cases The amplitude of the signal or carrier delivered is modulated (changing) depending on the information being sent, but the frequency remains fixed. About AIR:- It is the national public radio broadcaster of India. It is a division of Prasar Bharati. It was established in 1936. Headquarters: New Delhi Mission Uphold the unity of the country and the democratic values enshrined in the constitution. Present a fair and balanced flow of information on national, regional, local and international interests, including contrasting views. (UPSC PRELIMS: Asia-Pacific Broadcasting Union) Promote the interest and concerns of the entire nation. (UPSC PRELIMS: News Broadcasting & Digital Standards Authority) Serve the rural, illiterate and underprivileged population, keeping in mind the special needs and interests of the young, social and cultural minorities, the tribal population and those residing in border regions, backward or remote areas. Promote social justice and combat exploitation, inequality and such evils as untouchability and narrow parochial loyalties. Promote national integration. National programmes are broadcast from Delhi for relay by the Capital, Regional and Local Radio Stations. The Regional Stations in different States form the middle tier of broadcasting. They originate programmes in regional languages and dialects. Local radio stations serve small communities, showcase local culture and broadcast area-specific programmes for the benefit of the community. The first FM Channel was launched on an experimental basis in 1977 in Chennai. At present AIR have 497 FM transmitters across the country. MUST READ: Broadcasting Infrastructure and Network Development (BIND) scheme SOURCE: ET NOW PREVIOUS YEAR QUESTIONS Q.1) Which one of the following is the context in which the term “qubit” is mentioned? (2022) Cloud Services Quantum Computing Visible Light Communication Technologies Wireless Communication Technologies Q.2) With reference to Web 3.0, consider the following statements: (2022) Web 3.0 technology enables people to control their own data. In the Web 3.0 world, there can be blockchain-based social networks. Web 3.0 is operated by users collectively rather than by a corporation Which of the following given above is correct? 1 and 2 only 2 and 3 only 1 and 3 only 1, 2 and 3 Soniferous fishes Syllabus Prelims –Environment and Ecology Context: Recently, the latest technology has been used to study Soniferous fishes on the coast of Goa. About Soniferous fishes:- IMAGE SOURCE: PPT – Nonvertebrate Chordates, Fishes, and Amphibians PowerPoint Presentation – ID:3223997 (slideserve.com) These fishes are known to make sounds associated with specific behaviours including disturbance, competition for food, territory defence, and courtship or spawning. They produce sound mainly by using modified muscles attached to their swim bladders(drumming) or rubbing body parts together. Sound production in fish is vital to an array of behaviours including territorial defence. There are over 700 known soniferous species worldwide.(UPSC CSE: Conservation of species) Passive acoustics is a technique that enables scientists to listen to and record underwater sounds of aquatic and marine fishes and invertebrates. Using this technique, scientists can gain useful information about the temporal and spatial distribution patterns of soniferous fishes and the locations of spawning and feeding grounds. (UPSC Mains: Government’s Initiatives for a Robust Fishery Sector ) MUST READ: Puffer Fish SOURCE: DOWN TO EARTH PREVIOUS YEAR QUESTIONS Q.1) Which of the following is not a bird? (2022) Golden Mahseer Indian Nightjar Spoonbill White Ibis Q.2) Certain species of which one of the following organisms are well known as cultivators of fungi? (2022) Ant Cockroach Crab Spider Index of Eight Core Industries (ICI) Syllabus Prelims –Economy Context: Recent reports show that the combined Index of Eight Core Industries (ICI) increased by 3.6 per cent (provisional) in March 2023 as compared to the Index of March 2022. About the Index of Eight Core Industries (ICI):- IMAGE SOURCE: Index of Eight Core Industries (Base: 2011-12=100) March 2019 (indiangovtscheme.com) ICI measures combined and individual performance of the production of eight core industries. These include Coal, Crude Oil, Natural Gas, Refinery Products, Fertilizers, Steel, Cement and Electricity. These Eight Core Industries comprise 40.27 per cent of the weight of items included in the Index of Industrial Production (IIP). (UPSC PRELIMS: Index of Industrial Production (IIP) Details of annual and monthly indices and growth rates are provided in Annex I & II respectively. It is compiled and released by the Office of Economic Adviser (OEA), Department for Promotion of Industry and Internal Trade (DPIIT), Ministry of Commerce and Industry. It provides an advance indication of the production performance of industries of
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