JKPSC Prelims and Mains Notes, JKPSC Test Series
Nanotechnology and its applications The concept “Nanotechnology” was first proposed by Richard Feynman on 29th December, 1959 in his talk entitled “There’s plenty of room at the bottom” at the California Institute of Technology. Deriving its name from the Greek word “dwarf” meaning small, nanotechnology is commonly defined as the combined art of science and … Read more
Nuclear energy Everything around us is made up of tiny objects called atoms. Most of the mass of each atom is concentrated in the center (which is called the nucleus), and the rest of the mass is in the cloud of electrons surrounding the nucleus. Protons and neutrons are subatomic particles that comprise the nucleus. … Read more
Nuclear reactors A nuclear reactor, formerly known as an atomic pile, is a device used to initiate and control a self-sustained nuclear chain reaction. Nuclear reactors are used at nuclear power plants for electricity generation and in propulsion of ships. Heat from nuclear fission is passed to a working fluid (water or gas), which in … Read more
Civilian and military uses of Nuclear energy Civilian uses Plant mutation breeding Plant mutation breeding is the process of exposing the seeds or cuttings of a given plant to radiation, such as gamma rays, to cause mutations. The irradiated material is then cultivated to generate a plantlet. Plantlets are selected and multiplied if they show … Read more
Institutional structure for development of nuclear technology in India The huge potential of the atom had been envisioned in India in the ancient times and references to the same can be found in some of the ancient scriptures. Such references provide us a tantalizing glimpse into the ancient Indian history and, indeed, into the level … Read more
Telecommunication Telecommunications, also known as telecom, is the exchange of information over significant distances by electronic means and refers to all types of voice, data and video transmission. This is a broad term that includes a wide range of information transmitting technologies such as telephones (wired and wireless), microwave communications, fiber optics, satellites, radio and … Read more
Indian telecom industry with brief history India’s telecommunication network is the second largest in the world by number of telephone users (both fixed and mobile phone) with 1.153 billion subscribers as on 31 May 2018. It has one of the lowest call tariffs in the world enabled by mega telecom operators and hyper-competition among them. … Read more
Electromagnetic Wave Electromagnetic Wave are waves composed of undulating electrical fields and magnetic fields. The different kinds of electromagnetic waves, such as light and radio waves, form the electromagnetic spectrum. All electromagnetic waves have the same speed in a vacuum, a speed expressed by the letter c (the speed of light) and equal to about … Read more
Communication System Subscribe on YouTube The word communication has been derived from Latin ward ―communis‖ which means common. Thus communication means sharing of ideas is common. It can be defined as exchange of facts, ideas, opinions or emotions between two or more persons to create a common ground of understanding. Communication is the … Read more
Definition of digital computer, Elements of computer: Input unit, Output unit, Primary memory, Secondary memory and Processing unit. Computer is an electronic device that is designed to work with Information. term computer is derived from the Latin term‘computare’, this means to calculateor programmable machine. Computer cannot do anything without a Program. It represents the decimal numbers through a string … Read more