Tnpsc and Upsc Notes Pdf
Natural Magnets Artificial Magnets These are found naturally and they are irregular in shape. These are made by man which is a definite shape based on the usage. The strength of the magnet is natural and it is difficult to change. Artificial Magnet is made with specific strength as required. Natural Magnets are long-lasting, i.e … Read more
Heat and Temperature physics: Introduction This article is written for the Tnpsc exam for the topic ‘Heat’, in General studies. Science part (Physics). This note is for quick revision purpose only, kindly refer to Samacheer Kalvi Book. The measurement of warmness(hotness) or coldness of a substance or object is called its temperature. Temperature is also … Read more
Elements and Compounds in Chemistry Types of Pure Substances For a normal person, a pure substance means it is free from adulteration. Even Milk, Air, Water, etc. are not pure. In some cases, there are pure substances or single substances such as distilled water, sugar, baking soda, etc. Also Copper used for making electric wire … Read more
Laser This article is compiled for the topic “ Laser” in General Studies Tnpsc. This note is compiled from Samacheer Kalvi Book. This note is for revision only. Kindly refer to the Original Samacheer Kalvi book for more clarity. Laser meaning or laser full form is light amplification by the stimulated emission of radiation. The … Read more
Imagine our world without science and all these inventions and discoveries? How would it look like? You would not do things you do now such as job, work, going to school, theatres, etc. Or you would eat breakfast, lunch, or dinner sitting at a table, where the food is cooked for buying your favorite dish … Read more
This article is written for the Tnpsc exam for the topic ‘Sound’, in General studies. Science part (Physics). This note is for quick revision purposes only, Kindly refer to Samacheer Kalvi Book. What is sound in physics? Sound is a type of energy that creates a sensation in our ears. Sound in physics is the … Read more
Basics of Nuclear Science In 1803, John Dalton considered elements are made of identical atoms. J. J. Thomson discovered electrons, also called Cathode rays in an experiment. Goldstein found positive rays. We name these positive rays Protons, by Rutherford. James Chadwick in 1932 discovered the chargeless particles called Neutrons. Currently, there are other particles found … Read more
Nature of Universe This article is written for the Tnpsc and Upsc exams. Points to remember for the topic “Nature of Universe” and “Earth and universe Tnpsc“. This reference material is compiled from the Samacheer Kalvi book. The universe is a vast endless space with galaxies, stars, planets, energies, etc. It is about the universe … Read more
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