Electrics Essay Example | Topics and Well Written Essays - 2250 words

Electrics - Essay Exampleone watt is equivalent to 1 joule of cleverness per second. It is basically a measure of the rate of energy consumption. All the electrical appliances like bulb, refrigerator, television sets, computer, printer, iron consume some amount of electricity which decides their wattage. As a thumb rule, more(prenominal) the wattage more will be electrical consumption by that product.v. Farad (F) It is the SI unit of capacitive charge. An electric capacitor is made up of two double plates. As a result of electrical current some charge is stored on the plates of the capacitor. This charge is measured in Farad. One Farad is the capacitance having an equalise and opposite charge of 1 coulomb on each plate and a fiveage difference of 1 voltage between the plates. If the charge stored is less(prenominal) in quantity, it is measured in Micro-Farad (F) or Pico-Farad (pF).vi. Henry (H) It is the measure of inductive force produced in an inductor. Electromotive force is produced when we vary the current in an inductor. One volt of electromotive force (emf) is produced when the current is varied at the rate of one ampere per second. The unit is named after Joseph Henry, an American scientist of 18th century, who discovered electromagnetic induction.a. Temperature Coefficient of Resistance This coefficient depicts the install of temperature on the subway system of an electrical theatre director. Increase or decrease of temperature affects the movement of the molecules within an atom. As temperature rises the movement increases, which in turn results in more bang amongst the molecules, thus impacting the specific resistance of the material. Therefore, in general the value of resistance (measured in ohms) of a material will depend upon the temperature coefficient of the resistance for the conductor. The total resistance for a material can be defined asR = Rref 1 + (T-Tref) Ohms or Where, R = Resistance of the conductor at a temperature, TRref = Res istance of conductor at a reference temperature of Tref. The Tref is usually 200C and sometimes for experimental purposes it is 00C. = Temperature coefficient of resistance for conductor material.T = Conductor temperature in degrees CelsiusT = Reference temperature at which the Temp. Coefficient for the material is definedb. Relative Permittivity of Substance (r) It is the Ratio of the electric field strength in vacuum to that in a abandoned medium.i.e. r = / oWhere is the permittivity of the substance and o is the permittivity of the free space. The relative permittivity is also known as the dielectric strength of the substance. The dielectric constant is a complex constant with the accepted part giving reflective surface properties. The relative permittivity values affect the magnetic and electric behaviour of a conductor. The value of relative permittivity of a given substance keeps varying depending upon the electrical frequency, temperature etc.c. Magnetic Hysteresis The Hyst eresis is a magnetic property of a substance. This phenomenon is generally observed in ferromagnetic substances like Iron, nickel, cobalt etc. This group is called ferromagnetic as iron or ferric is an