GPSC Prelims and Mains Notes, GPSC Test Series
Atomic Structure In 1897 J.J. Thomson discovered electron as a constituent of atom. He determined that an electron had a negative charge and had very little mass as compared to that of the atom. Since an atom was found to be electrically neutral it was inferred that some source of positive charge must be present … Read more Atomic structure
Geologically Rajasthan comprises rocks from oldest Archean rocks to recent alluvium formations . The oldest formations are known as Banded Gneissic Complex exposed in central and southern Rajasthan. The Aravalli hill range dividing the State diagonally is made up of precambrian rocks of Aravalli and Delhi Super group comprising the metamorphosed gneisses, schists, marble, quartzite, … Read more Rajasthan : Geological Structure
Semiconductor Devices:- Semiconductor devices are electronic components that exploit the electronic properties of semiconductor materials, principally silicon, germanium, and gallium arsenide, as well as organic semiconductors. Semiconductor devices have replaced thermionic devices (vacuum tubes) in most applications. There are two basic groups or classifications that can be used to define the different semiconductor types: Intrinsic … Read more semi conductor devices
This module will teach you the basics of direct and indirect proportions. These concepts will further help you in time and work questions. Important Formulas – chain rule Direct Proportion Two quantities are said to be directly proportional, if on the increase or decrease of the one, the other increases or decreases the same … Read more CHAIN RULE
They are aggregates or physical mixture of one or more minerals. Minerals on the other hand are made up of two or more elements in a definite ratio. They have a definite chemical composition. Crust is made up of more than 2000 minerals, but out of these, 6 are the most abundant and … Read more Major types of rocks and their characteristics
Wetland Conservation Programme Wetlands are lands transitional between terrestrial and aquatic system where the water table is usually near the water surface and land is covered by shallow water. Essential as: control floods, water treatment, recharging of water sources, reduce sediments, check soil erosion, bulwark against encroachment by the sea, winter resort for birds and … Read more Wetland Conservation Programme, Ramsar Convention and The Montreux Record.
Mineral is a naturally occurring, homogeneous inorganic solid substance having a definite chemical composition and characteristic crystalline structure, color, and hardness Minerals are valuable natural resources that are finite and non-renewable. The history of mineral extraction in India dates back to the days of the Harappan civilization. The wide availability of minerals in the … Read more Minerals and Energy Resources : Distribution and utility of [a] metallic minerals (ion ore, copper, bauxite, manganese)
After being released in 1914, Tilak sought re-entry into Congress. Annie Besant and Gokhale supported. But finally Pherozshah Mehta won and Tilak was not admitted. Tilak and Besant decided to start the home rule movement on their own. In early 1915, Annie Besant (and S Subramaniya Iyer) launched a campaign through her two newspapers, New … Read more The Home Rule Movement
Bahadur Shah 1 (1707-12) Muzam succeeded Aurungzeb after latter’s death in 1707 He acquired the title of Bahadur Shah. Though he was quite old (65) and his rule quite short there are many significant achievements he made He reversed the narrow minded and antagonistic policies of Aurungzeb Made agreements with Rajput states Granted sardeshmukhi to … Read more India in the Eighteenth Century
Contents