Tnpsc and Upsc Notes
UNIT-I: GENERAL SCIENCE (i) Scientific Knowledge and Scientific temper – Power of Reasoning– Rote Learning Vs Conceptual Learning – Science as a tool to understand the past, present, and future. (ii) Nature of Universe – General Scientific Laws – Mechanics – Properties of Matter, Force, Motion and Energy – Everyday application of the basic principles … Read more
If you want to understand better World Physical Geography for your department or competitive exams, then you need to take the help of good geography books to understand the concepts and revise well. To help you get better marks in Geography here is a popular list of geography books that are available on Amazon. 1. … Read more
Prerogative Writs in India There are five writs in India: Habeas Corpus It means to produce the person in the body. It applies in cases where a person is alleged to have been illegally detained. This writ safeguards the personal liberty of every individual. Mandamus It is meant to direct any authority to perform its … Read more
Public Interest Litigation (PIL) Public Interest Litigation (PIL) is a litigation that is undertaken to secure public interest. It is also used to demonstrate the availability of justice to the disadvantages parties or people. PIL was introduced by Justice P.N.Bhagwati after relaxation of traditional rule of locus standi. Any citizen of India can approach the … Read more
Armed forces (Special Powers Act) It is stringent law that allows the armed forces to use maximum powers in certain regions which are declared as “Disturbed”. Disturbed area When a state or part of it is at continued unrest such as cases of militancy and insurgency and especially its borders are threatened. By Act 7 … Read more
Ukraine Russia conflict summary A Small region in eastern Ukraine known as Donbas adjoins the Russian border. This region has frequent Military conflicts. In region was incorporated into the newly created Ukrainian People’s Republic in 1918, after the fall of the Russian Empire. After this Bolsheviks were fighting the civil war against the remnants of … Read more
Light Introduction Light is a kind of energy and electromagnetic waves. Optics is a science branch that deals with features and uses of light. Ray optics or geometrical optics is the branch of optics that treat light as rays. Wave optics is the branch of optics where the wave nature of light is considered. Reflection … Read more
Modulation Transmission of data for short ranges does not need any complex procedures. Example an audio frequency of range 20 to 20,000 Hz when transmitted over long distances some techniques are used to transmit the information without any loss. “For long-distance broadcast, the low-frequency baseband signal (input signal) is superimposed onto a high-frequency radio signal … Read more
The modulated signal is transmitted by the antenna. It is received at the other end. 2kHz to 400 GHz Frequencies are transmitted with wireless communication. While the signal travels from the transmitter to the receiver, the strength of the electromagnetic wave keeps decreasing. Three modes by which EM waves are transmitted. They are: Ground wave … Read more
The communication of information in the form of light pulses by optical fibre is called fibre optic communication. Light has a frequency of 400 THz to 790 THz. Which is higher than the microwave radio system. The fibre is made of silica glass or silicon dioxide. Now it is succeeded with chalcogenide glasses, fluoro aluminate … Read more
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