Title Electrical Installation.pdf ✅

Electrical Installations Electrical Basics 3 “Power”: Power measures the rate at which energy is transferred or transformed. The transformation of 1 joule of energy in 1 second represents an average power of 1 watt. “Charge”: Charge is a “Quantity” of electricity .The coulomb is defined as the charge on 6.24 x 1018 electrons or as the charge experiencing a force of 1 newton in an electric field of 1 volt per meter or as the charge transferred in 1 second by a current of 1 ampere. “Current”: The current through an area is defined by the eloctric charge passing through per unit of time. The current is the net rate of flow of positive charges. In a current of 1 ampere, charge is being transferred at the rate of 1 coulomb per second. “Voltage”: The energy transfer capability of a flow of electric charge is determined by the potential difference or voltage through which the charge moves. A charge of 1 coulomb receives or delivers an energy of 1 joule in moving through a voltage of 1 volt. “Magnetic Flux Density”: around a moving charge or current exists a region of influence called a “Magnetic Field”.” The intensity of the magnetic effect is determined by the magnetic flux density which is defined by the magnitude and direction of a force exerted on a charge moving in the field with a certain velocity. A force of 1 newton is experienced by a charge of 1 coulomb moving with a velocity of 1 meter per second normal to a magnetic flux density of 1 tesla. “Magnetic Flux”: Magnetic flux quantity I, in Weber, am obtained by integrating magnetic flux density over an area. The idea of electric potential & current: - The Voltic Cell The figure here indicates a simple voltic cell. One copper plate and one zinc rod are immersed in dilute H2SO4. Flow of electrons Figure 1.1 Voltic cell & it’s analogy Due to chemical reaction the electrons are removed from copper plate and deposited on zinc rod. Thus Cu becomes positive and Zn becomes negative charged. As large number of electrons gets deposited on zinc, they are being attracted by anode but due to the force setup by chemical reaction, they cannot take internal route. Now if a conductor connects the two electrodes, then the electrons Cu-- -Zn H2SO4 Water Pump I I