11/26/2022 0 Comments Iunit for power![]() ![]() Sometimes a bigger unit namely kilocalorie is used. ![]() The unit of heat is calorie, British thermal unit (B.Th.U.) and centigrade heat units (C.H.U.) on the various systems.Ĭaloric: It is the amount of heat required to raise the temperature of 1 gm of water through 1☌ ![]() Heat is a form of energy which produces the sensation of warmth. In practice, for the measurement of electrical energy, bigger units viz., watt-hour and kilowatt hour are used.ġ kilowatt hour (kWh) = 1 kW x 1 hr = 1000 watt x 3600 sec = 36 x 10 5 watt-sec. Joule or watt-sec is a very small unit of electrical energy for practical purposes. A watt is the measure of the rate of power flow. of 1 volt exists between them and 1 ampere current passes between them for 1 second i.e.,Įlectrical energy in watt-sec (or joules) = voltage in volts x current in amperes x time in seconds In order to determine how much a kilowatt is, we must first understand watts. For Electricity billing for household application kilowatt-hour is commonly used measurement unit, Kilowatt- hour for power consumption means 3600 Kilo Joules. One watt-second (or joule) energy is transferred between two points if a p.d. The unit of electrical energy is watt-sec or joule and is defined as follows: Mechanical energy in joules = Force in newton x distance in meters 2. The work done on a body is one newton-metre (or joule) if a force of one newton moves it through a distance of one metre i.e., Technically it is the amount of work done per unit of time. The unit of mechanical energy is newton-metre or joule on the M.K.S. Power is the rate at which energy is transferred or Converted or the rate of doing work. However, it must be realized that since mechanical, electrical and thermal energies are interchangeable, it is possible to assign the same unit to them. The Energy expended to do work in unit time is termed as Power. Different units have been assigned to various forms of energy. ![]()
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