Electric transformers

Electric transformers Electrical transformers are machines that transfer electricity from one circuit to another with changing voltage level but no frequency change. Today, they are designed to use AC supply, which means that fluctuation in supply voltage is impacted by the fluctuation in the current. So, an increase in current will bring about an increase … Read more Electric transformers

Electric motor

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

Electric Generators

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, their type and utility in human life

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 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

Telescope

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

15-16.04.18 Uttarakhand (UKPCS) Current Affairs

UTTARAKHAND   Guv launches book donation programme   The Uttarakhand Governor Krishan Kant Paul  launched a book donation programme at the Government College in Thalisain Tehsil of Pauri district on Sunday. He also inaugurated the  arts  building of the  Government College at Thalisain on the occasion . The Governor participated in the annual programme of … Read more 15-16.04.18 Uttarakhand (UKPCS) Current Affairs