UKPCS Prelims and Mains Notes-UKPSC Test Series
Current Electricity Electric current is the rate of flow of electric charge through a conducting medium with respect to time. It is caused by drift of free electrons through a conductor to a particular direction.Charges in motion constitute an electric current. Such currents occur naturally in many situations. Lightning is one such phenomenon in which … Read more Electric current
UTTARAKHAND Now, an app for rainwater harvest queries People interested in installing rainwater harvesting plants in their homes would soon be able to do so with a smart phone app. The Uttar Pradesh groundwater department will soon launch an Android-based mobile application which will enable people to easily install rainwater harvesting plants. The app will also … Read more 04.10.17 Uttarakhand (UKPCS) Current Affairs
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
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
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
Elementary idea of LASER Laser, a device that stimulates atoms or molecules to emit light at particular wavelengths and amplifies that light, typically producing a very narrow beam of radiation. The emission generally covers an extremely limited range of visible, infrared, or ultraviolet wavelengths. Many different types of lasers have been developed, with highly varied … Read more Elementary idea of LASER
Surface tension Surface tension, property of a liquid surface displayed by its acting as if it were a stretched elastic membrane. This phenomenon can be observed in the nearly spherical shape of small drops of liquids and of soap bubbles. Because of this property, certain insects can stand on the surface of water. A razor … Read more Surface tension
Conventional and Non Conventional Sources of Energy Main Sources of Energy: The sources of energy are of following types: Conventional Sources of Energy: These sources of energy are also called non renewable sources. These sources of energy are in limited quantity except hydro-electric power. (a) Coal and Lignite: Coal is the major source of energy. Coal … Read more Conventional and Non Conventional Sources of Energy
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
Electric power plant Electricity is produced at a an electric power plant. Some fuel source, such as coal, oil, natural gas, or nuclear energy produces heat. The heat is used to boil water to create steam. The steam under high pressure is used to spin a turbine. The spinning turbine interacts with a system of … Read more Electric power plant