Radar and its applications

Radar stands for Radio Detection and Ranging System. Used to detect and locate objects like an aeroplane, missile, ships, etc. Radar uses electromagnetic waves radiated by an antenna in all directions when a signal strikes an object, it gets reflected.  This reflected signal is received by a radar antenna and fed to the receiver. The … Read more

Generation of mobile communication technologies

Generation of mobile communication technologies

Mobile communication introduction Mobile communication is the technology that makes us connect with others (person, devices, etc.), without using physical connections or wires. The first mobile was demonstrated by Martin Cooper and John F. Mitchell of Motorola in 1973. Also, the first commercial cellular network was introduced by Nippon Telegraph and Telephone in 1979 in … Read more

Application of Information and communication technology(ICT)

Information and Communication technology is used in areas such as Medicine, Defence, e-governance, Banking, etc. With the advances in computing infrastructure and communication got automated in recent times. Application of Information and communication technology Agriculture Widely used in increasing food productivity. Optimize the use of water, seeds and fertilizers. Use of robots, temperature, moisture sensors, … Read more

Sharing your stories has never been easier

Nunc id sapien finibus faucibus odio vitae aliquam eros. Ante ex mauris a mus lobortis, urna elit odio nibh ac aliquet ipsum leo commodo quam. Proin semper leo ligula aenean utt erat non quam amet. Morbi fames tempor purus, at semper velit sapien vel in blandit ante. Etiam feugiat ligula turpis enim pulvinar mollis sed. … Read more

Water pollution causes effects and solutions

Water pollution causes effects and solutions

Water Pollution Definition “The introduction (directly or indirectly) of substances or energy into the marine environment (including estuaries) results in deleterious effects to living resources, hazards to human health, a hindrance to marine activities” said United Nations, 1971. Types of Water Pollution a. Surface Water Pollution The poisonous or Hazardous things come in contact with … Read more

Digital electronics and logic gates

Digital Electronics It is a sub-branch of electronics that deals with digital signals. Used in large applications from high-end processor circuits to miniature circuits for signal processing, communication, etc. It is preferred over analog signals for its performance, accuracy, speed, immunity to noise, etc. Analog and Digital Signal Analog signal is varying voltage or current … Read more

Panchayat Raj: Gandhi vs Ambedkar

Gandhi wanted the central government to have less power and wanted the villages to rule themselves traditionally with village chiefs and councilors. According to Ambedkar, the village possessed a cruel reality of communalism and a caste system, which will lead to problems for the minorities. Gandhi through his social and political initiatives facilitated the county … Read more

Need of special privileges

Need of special privileges

Need of special privileges If poor children were not provided with adequate education and proper health care, we are raising hue and cry. We give our voice for justice. First, let us understand what we accept and which we refuse. If a person is treated with great respect on the basis of his caste, language, … Read more

Article 16 (4) of Indian Constitution

This will not prevent any sort of appointment or reservation among backward communities if sufficient representation is not provided. In India, inequality is existing due to the Varna System. According to the Indian Constitution, states which are having low technology or inadequate natural resources can make their own special policies for holistic advancement. In accordance … Read more

* * All the Notes in this blog, are referred from Tamil Nadu State Board Books and Samacheer Kalvi Books. Kindly check with the original Tamil Nadu state board books and Ncert Books.