------------------------------------------------- Electric generator In electricity generation‚ an electric generator is a device that converts mechanical energy to electrical energy. A generator forces electric charge (usually carried by electrons) to flow through an external electrical circuit. It is analogous to a water pump‚ which causes water to flow (but does not create water). The source of mechanical energy may be a reciprocating or turbine steam engine‚ water falling
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dissociate the weak acid. CH3COOH H+(aq) + CH3COO-(aq) approx 99% approx 1% Conductivity Any solution’s ability to conduct electricity is conditioned by the concentration of ions it contains. A strong acid has more ions than a weak one‚ and so it’s solution will be a better electrical conductor than a weak acid. The same goes for strong/weak bases. The conductivity may be measured using a power pack and two graphite electrodes connected to an ammeter. The apparatus
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Resistance in a Conductor: The electrical resistance of an electrical conductor is the opposition to the passage of an electric current through that conductor. Electrical resistance shares some conceptual parallels with the mechanical notion of friction. The SI unit of electrical resistance is the ohm (Ω).An object of uniform cross section has a resistance proportional to its resistivity and length and inversely proportional to its cross-sectional area. All materials show some resistance‚ except
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EXPERIMENT 5 Title: Conductivity of Strong Electrolytes Date: 16 August 2005 Objectives: ▪ To determine the relationship between the concentration and conductivity of various electrolytes ▪ To determine the conductivity at infinite dilution ▪ To determine the activity coefficients Theory: The resistance‚ R of a conductor with a similar cross section is proportional to the length (l) and inverse to the cross section area(A)‚ therefore; [pic]
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Experiment 4: Conductivity of electrolyte solutions (Dated: October 29‚ 2009) I. INTRODUCTION Pure water does not conduct electricity‚ but any solvated ionic species would contribute to conduction of electricity. An ionically conducting solution is called an electrolyte solution and the compound‚ which produces the ions as it dissolves‚ is called an electrolyte. A strong electrolyte is a compound that will completely dissociate into ions in water. Correspondingly‚ a weak electrolyte dissolves
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Electrical engineering - Wikipedia‚ the free encyclopedia Page 1 of 13 Electrical engineering From Wikipedia‚ the free encyclopedia Electrical engineering is a field of engineering that generally deals with the study and application of electricity‚ electronics and electromagnetism. The field first became an identifiable occupation in the late nineteenth century after commercialization of the electric telegraph and electrical power supply. It now covers a range of subtopics including power
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are made part of an electrical circuit through which alternating current (AC) flow causing heat to be generated within the food due to the electrical resistance of the foods. AC voltage is applied to the electrodes at both ends of the product such as both ends of vessel. The rate of heating is directly proportional to the square of the electric field strength and electrical conductivity. The most important factor that effectuates the rate of heating is electrical conductivity and its temperature
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large distance between atoms in a gas: fewer collisions between atoms means less conduction. Conductivity of gases increases with temperature. Conductivity increases with increasing pressure from vacuum up to a critical point that the density of the gas is such that molecules of the gas may be expected to collide with each other before they transfer heat from one surface to another. After this point conductivity increases only slightly with increasing pressure and density. Thermal contact conductance is
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provides two new reasons for using the material for interconnects in future computer chips. In widths as narrow as 16 nm‚ graphene has a current-carrying capacity approximately a thousand times greater than copper while providing improved thermal conductivity. The current-carrying and heat-transfer measurements were reported by a team of researchers from the Georgia Institute of Technology (Atlanta‚ GA). The same team had previously reported measurements of resistivity in graphene that suggest the material’s
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Both test section are equipped with an array of temperature gradient. The instrumentation provided permits accurate measurements of temperature and electrical power supplied to the heater. Fast response temperature probes‚ with a resolution of 0.1°C‚ give direct digital readout in °C. The power control circuit provides a continuously variable electrical output of 0-80 Watts nominal (at nominal supply voltage) with direct digital readout having a resolution of 0.1W. The test
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