UKPCS Prelims and Mains Notes-UKPSC Test Series
Linear motion Linear motion, also called uniform motion or rectilinear motion, motion in one spatial dimension. According to Newton’s first law (also known as the principle of inertia), a body with no net force acting on it will either remain at rest or continue to move with uniform speed in a straight line, according to … Read more Linear motion, circular motion and vibrational motion
Usefulness of animals and human affairs As food The human population exploits a large number of animal species for food, both of domesticated livestock species in animal husbandry and, mainly at sea, by hunting wild species. Marine fish of many species, such as herring, cod, tuna, mackerel and anchovy, are caught commercially, forming an important … Read more Usefulness of animals for mankind
Common classification of animals – domestic and wild animals The pets in our households are all descendants of wild animals, many of which still run free today. But dogs, cats, and rodents are all domesticated to varying degrees, with a wide range of consequences for their behavior and genetics. To understand the nitty gritty of … Read more Common classification of animals – domestic and wild animals
Electric motor Electric motor, any of a class of devices that convert electrical energy to mechanical energy, usually by employing electromagnetic phenomena. Most electric motors develop their mechanical torque by the interaction of conductors carrying current in a direction at right angles to a magnetic field. The various types of electric motor differ in the … Read more Electric motor
working principle and use of generator Generator is a machine that converts mechanical energy into electrical energy. It works based on principle of faraday law of electromagnetic induction. The faradays law states that whenever a conductor is placed in a varying magnetic field, EMF is induced and this induced EMF is equal to the rate … Read more Electric Generators
X-rays and their properties X-rays or x-radiation are part of the electromagnetic spectrum with shorter wavelengths (higher frequency) than visible light. X-radiation wavelength ranges from 0.01 to 10 nanometers, or frequencies from 3×1016 Hz to 3×1019 Hz. This puts the x-ray wavelength between ultraviolet light and gamma rays. The distinction between x-ray and gamma rays … Read more X-rays, their type and utility in human life
Magnetic effect of current Magnetic effect of electric current is one of the major effects which functions as the basic principle in appliances used in various fields of activities. The magnetic field around a current carrying conductor can be depicted by using magnetic field lines which are represented in the form of concentric circles around … Read more Magnetic effect of current
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 Elementary idea of atomic structure
Simple telescope and astronomical telescope, Construction working, uses, ray diagram Simple telescope A simple working telescope requires nothing more than a pair of lenses mounted in a tube. The lens in front, known as the objective, focuses an image; the lens in back, known as the eyepiece, magnifies the image. Although it may seem like … Read more Telescope
Laboratory method of preparing alcohol Hydrolysis of Alkyl Halides This is a nucleophilic substitution reaction. R-X + KOHaq → R-OH The method is not satisfactory as olefins are also formed as by-products. However better yields is obtained by using moist Ag2O or aqueous K2CO3. Tertiary butyl halides mainly gives alkene due to dehydrohalogenation. Hydration of Alkenes This … Read more Methods of preparing alcohols (Methanol and Ethanol)