Electrical hub

WHAT  IS  CAPACITOR   ?  Questions And Answer     A capacitor is a device that stores electrical energy in an electric field.  It is a passive electronic component with two terminals. The effect of a capacitor is known as capacitance. Capacitor is store Electrical charge. Unit of capacitor is  farad. Dielectric capacitor Most capacitors have a dielectric spacer,  increases their capacitance compared to air or a vacuum. In order to maximise the charge that a capacitor can hold, the dielectric material needs to have as high a permittivity as possible, while also having as high a breakdown voltage as possible. The dielectric also needs to have as low a loss with frequency as possible.  However, low value capacitors are available with a vacuum between their plates to allow extremely high voltage operation and low losses. Variable capacitors with their plates open to the atmosphere were commonly used in radio tuning circuits. Later desig...

  What is Network Theorems ?  1. Network  :                       Any arrangement of electrical energy sources, resistance and other circuit elements is called an electric network.  The terms circuit and network are used synonymously in Electrical literature. 2. Network Terminology :                        Active Element :                               An active element is one which supplies electrical energy to the circuit. E1 and E2 is active element. Passive elements  :                                     A passive element is one which receives electrical energy . R1, R2 And R3 is passive element. Node  :             A node of a network is an equipo...

what is Resistance ? Definition :                             The opposition offered by a substance to the flow of Electric current is called it's resistance. Since current is the flow of free electrons, resistance is the opposition offered by the substance to the flow free electrons. this opposition occurs because atoms and molecules of the substance obstruct the flow of these electrons. Certain substance ( e.g , metals such as silver, copper, aluminium etc. ) Offer very little opposition to the flow of Electric current and are called conductor.on the other hand, those substance which offer high opposition to the flow of Electric current ( i.e. , flow of free electrons ) are called insulator.   (   The opposition flow of current.) Resistance यह current को  रोकता हैं। यानी oppose करता है। Electrical Resistors                           ...

आज हम Electric current ओर voltage  बारे मे जानेगे ? Definition of current             Flow of electrons to the conductor is called electric current.   किसी भी conductor से electrons flow होते है उसे electric current कहते है. Unit of current.  Ampere होता है उसे    I   से denote करते है I  =  current Voltage क्या है Voltage  यह एक pressure या force जो current को  Flow करणे मदत करता है . उसे voltage कहते है इस का  unit volt है.  V = volt