CGPCS Prelims and Mains Notes, CGPCS Test Series
lndia’s threatened,endangered and endemic species India, a megadiverse country with only 2.4% of the world’s land area, accounts for 7-8% of all recorded species, including over 45,000 species of plants and 91,000 species of animals. The country’s diverse physical features and climatic conditions have resulted in a variety of ecosystems such as forests, wetlands, grasslands, … Read more lndia’s threatened,endangered and endemic species
PN Junction Diode A PN-junction diode is formed when a p-type semiconductor is fused to an n-type semiconductor creating a potential barrier voltage across the diode junction The effect described in the previous tutorial is achieved without any external voltage being applied to the actual PN junction resulting in the junction being in a state … Read more PN Junction Diode
The photoelectric effect The photoelectric effect is the emission, or ejection, of electrons from the surface of, generally, a metal in response to incident light.A material that can exhibit The photoelectric effect is said to be photoemissive, and the ejected electrons are called photoelectrons. The process was discovered by Heinrich Hertz in 1887. Attempts to … Read more Photo electric effect
Solar Energy : Source, Solar heating devices, solar cooker solar cell Sunlight is Earth’s most abundant energy source and is delivered free of charge. Indeed, the energy from sunlight reaching the land surface of the earth is thousands of times greater than the world’s current total annual consumption of energy. Yet harnessing sunlight’s energy content directly—rather than … Read more Source of solar energy, causes of origin of energy in the Sun, solar heating devices, solar cooker solar cell
Topological & Non-Topological Conservation Conservation – shape and structure of networks of interacting organisms in ecological systems In-Situ Conservation Protect whole ecosystem at all levels to protect threatened species (save entire forest to save tiger) Hot Spots – High endemism & high species richness (in India – Western Ghats (Agasthyamalai hills, Silent valley, … Read more Topological and Nontopological conservation
Relation between arc radius and angle Arc length = [radius • central angle (radians)] Arc length = circumference • [central angle (degrees) ÷ 360] Proof of the trigonometric ratios of complementary allied angles Two acute angles are complementary to each other if their sum is equal to 90°. In a right … Read more relation between arc, radius and central angle. Proof of the trigonometrical ratios of complementary angles
Area of triangle The area of triangles can be found by using the following formula: Area = Base × height / 2 The red line represents the length of the base (call it b if you want) and the blue line represents the length of the height. To get the area, just multiply the value … Read more area of triangle, condition of co-linearity of three points. Trigonometry – Measure of angles in the sexagesimal. contesimal and circular systems
Distance between two points Here is how to calculate the distance between two points when you know their coordinates: Let us call the two points A and B We can run lines down from A, and along from B, to make a Right Angled Triangle. And with a little help from … Read more Distance between two points,proportional division of a line (section formula)
CREDA – Chhattisgarh State Renewable Energy Development Agency CREDA – Chhattisgarh State Renewable Energy Development Agency, has been constituted on 25th May 2001 under the Department of Energy, Government of Chhattisgarh for implementation of various schemes pertaining to Renewable Energy sources and Energy Conservation activities. It is registered under Society Act 1973 with … Read more General information about CREDA
Electric current Ohm’s law and Resistance Electrical current is the flow of charged particles. The flow of charges will be constant in current electricity. Electric current flows from higher electric potential to lower electric potential. For the current to flow, it requires a circuit which is closed loop of a conducting material. The circuit … Read more Electric current Ohm’s law and Resistance