WBPSC Prelims and Mains Notes-WBPSC Test Series
Ray Optics The wave model of light has one serious drawback, though: Unlike other wave phenomena such as sound, or surface waves, it wasn‟t clear what the medium was that supported light waves. Giving it a name – the “luminiferous aether” – didn‟t help. James Clerk Maxwell‟s (1831 – 1879) theory of electromagnetism, however, showed … Read more
Aquatic systems are not called biomes, The major differences between the various aquatic zones are due to salinity, levels of dissolved nutrients; water temperature, depth of sunlight penetration. Fresh Water Ecosystem-Fresh water ecosystem are classified as lotic (moving water) or lentic (still or stagnant water). Marine Ecosystem- Estuaries-Coastal bays, river mouths and … Read more
Energy Resources- Conventional Energy Resources Petroleum, natural gas, coal, nitrogen, uranium and water power are examples of conventional sources of energy. They’re also called non-renewable sources of energy and are mainly fossil fuels, except water power. Rising growth of population has created a tremendous pressure on the conventional resources of energy and thus the concept of … Read more
The Pallava rule formed a golden epoch in the cultural history of south India. The period under the Pallavas was marked by considerable literary activities and cultural revival. The Pallavas warmly patronized Sanskrit language and most of the literary records of the time were composed in that language. Due to the cultural renaissance and … Read more
The continental drift theory is the theory that once all the continents were joined in a super-continent, which scientists call Pangaea. Over a vast period of time, the continents drifted apart to their current locations. Alfred Wegener first supported continental drift. Wegener’s explanation of continental drift in 1912 was that drifting occurred because of … Read more
Role of Foreign Capital and Multinational companies in Industrial development of India The development of any society or country without economic development is a myth. Economic development brings prosperity which in turns is directly proportional to the amount of goods and services produced quantitatively or in broad sense we can say in money … Read more
1707-12 Bahadur Shah I 1712-13 Jahandar Shah 1713-19 Farukk Siyar 1719-48 Muhammad Shah Rangila 1748-54 Ahmad Shah 1754-59 Alamgir II 1759-1806 Shah Alam II 1806-1837 Akbar Shah II 1837-57 Bahadur Shah II Later Mughal Rulers Bahadur Shah I After the death of Aurangzeb, prince Muazzam, Azam & Kam Bakhsh fought in … Read more
Variable Climatic condition throughout the state has led to the development of different agricultural practices. Scientists have divided the state into following agro-climatic regions:- Western Agricultural Region:- It covers the sandy arid plains with low rainfall and thus about 70% of the net cropped area is under Kharif crops of bajra and pulses. This region … Read more
The Green Revolution was initiated in the 1960’s to address the issue of malnutrition in the developing world. The technology of the Green Revolution involved bio-engineered seeds that worked in conjunction with chemical fertilizers and heavy irrigation to increase crop yields. Green Revolution was largely confined in wheat crop and in northern India such … Read more