While both the electrical resistance r and resistivity or specific resistance. There is no much study that presents all factors affecting efficiency and operation of the entire pv system, in the literature. Influence of environmental factors on componentequipment. The electrical resistance of an object is a measure of its opposition to the flow of electric current. A resistor is an electrical component used to add resistance to an electrical circuit. So, when length of the wire is doubled, its resistance also gets doubled.
Factors affecting the resistance electricity youtube. Oct 03, 2010 some oldfashioned electrical components. Amps are generated when voltage overcomes resistance. Electrical resistance as a function of conductivity. Factors influencing electrical conductivity environmental. The four main factors that affect the strength of an electromagnet are the loop count, the current, the wire size, and the presence of an iron core. Factors affecting electrical comminution performance were investigated through experimental work and numerical simulations. Follow report log in to add a comment answer expert.
Dhruv nandakumar 21816 resistance in a wire lab 1 purpose to investigate the relationship. To study the variation of electrical resistance physics astronomy project topics, physics science fair projects, pyhsical science, astrology, planets solar experiments for kids and also organics physics science ideas for cbse, icse, gcse, middleschool, elementary school for 5th, 6th, 7th, 8th, 9th and high school students for the year 2016. Factors that influence electrical resistivity measurements in cementitious systems article pdf available in transportation research record journal. The inverse quantity is electrical conductance, and is the ease with which an electric current passes. The electrical resistance, r of this simple conductor is a function of its length, l and the conductors area, a. Resistance, or impedance, decreases electrical current per ohms law. There are many factors that affecting the operation and efficiency of the pv based electricity generation systems, such as pv cell technology, ambient conditions and selection of required equipment.
Factors affecting resistance factors affecting resistance temperature. Dc resistance of a wire is determined by the wires shape e. Electrical resistance shares some conceptual parallels with the notion of mechanical friction. Testing the type of material is the easiest method for the learners to pursue in class. Its important not to confuse electrical potential voltage with electrical potential energy. In general, most voltage qualityrelated standards mainly aim at the steadystate voltage variations. May 15, 2016 thus a thick wire has less resistance and a thin wire has more resistance. Electric resistance of a conductor or a wire depends on the following factors length of the conductor. Factors affecting the resistance of a wire the aim of this experiment is to investigate one factor that affect the resistance of a wire. A worksheet created for low ability, eal students in preparation for igcse. This website beta version contains information on geophysical methods, references to geophysical citations, and a glossary of geophysical terms related to environmental applications. Department of electrical enginneering hassan usman katsina polytechnic, katsina email. Name the two factors that affect the strength of electric force, and explain how they affect it.
An electromagnet is made out of a coil of wire wrapped around a metal core usually iron and connected to a battery. This electrical resistance can be related to the geometryindependent property known as resistivity using the approach shown in equation 1. These factors invariably influence the quality, reliability and life of systems. Electrical resistance resistance r any device in a circuit which converts electrical energy into some other form impedes the current. Electrical conduction in most metallic conductors not semiconductors. Factors affecting electrical resistance completed lab report see answers 1 ask for details. Understanding these factors has useful applications in the construction of any electrical appliance, and in the design of the electrical wiring in our homes. Factors affecting of resistances, combination of series. Jan 04, 2015 factors affecting internal resistance emf of the cell 1. Four factors affecting resistance john vagabonds physics.
As power becomes a more essential and valuable resource for the entire world, it is important to maintain its quality at all levels of usage for the reliable working of the equipment. Introduction in a closed electric circuit, resistance of the components and the voltage of a power source are affecting the electric current. The third factor that affects amperage is temperature. As an extension, you could have the learners do a small project on how the crosssectional area of the material affects resistance or how temperature affects resistance. For example, the filament in a light bulb and a toaster have a high resistance. Factors effecting the resistivity of electrical materials are listed below temperature. A strain gauge converts micromechanical motions strain into electrical resistance changes. It aims to get them visualising the factors that effect resistance by drawing d. George ohm discovered that a circuit sometimes resists the flow of electricity. The lower the temp the lower the resistance becomes. There are a few factors that affect the resistance, it is determined by the properties an object has. Jun 08, 2011 three factors affecting electric current. Factors affecting voltage variation of distribution feeders.
Reliability assurance as a specific activity commenced about the year 1955. There are four factors which influence the amount of resistance of a conductor. Which of the following factors influence the electrical. The understanding of all factors that might influence the planning process directly and indirectly is a prerequisite to guaranteeing a realistic outcome. The factors affecting the conductance of electrolyte solutions temperature.
The strong electrolytes undergo complete ionization and hence show. In general, for metallic wire, the higher the temperature, the larger its resistance. Ralph lery guerrero kevin roxas marco lauro delos santos 2. View lab report factors affecting electrical resistance lab from science 101 at plano east sr h s. Factors affecting the future of power supply industry. Feb 27, 2017 the resistance of a given conductor depends on. Thus a long wire has more resistance then a short wire. Factors affecting electrical comminution performance.
The symbol for resistance is an uppercase italic r. The students must graphically determine the acceleration due to gravity near earths surface by putting the sphere into simple harmonic motion. The greater the charge, the greater the electric force. If the two circuits in your example have the same resistance, and the same voltage drop across them, then they will have the same current. Factors that influence electrical resistivity measurements. Resistance is a force, which opposes the flow of an electric current around a circuit. Ohms law tells us that for a given resistance r, the current flowing through the conductor is proportional to the applied voltage as i vr.
Electrical resistance of a conductor also depends on the nature of the material of which it is made. You say that if you increase the resistance, the voltage will rise. Factors that influence electrical resistivity measurements in cementitious systems article pdf available in transportation research record journal of the transportation research board 2342. Material used temperature of the above variables, i will be varying the length of the nichrome wire, and also, i will be varying the crosssectional area of the wire. Factors affecting electrical resistance completed lab. Greek letter sigma, is the reciprocal of the resistivity. Factors affecting of resistances, combination of series and. Typically, strain gauges are used to measure the stretching, compressing, and twisting of metal components under stress. Ohms law gives current as a ratio of voltage to resistance. What factors can lower the electrical resistance of a wire.
The first factor is the amount of charge on each object. The conductance of an electrolyte solution increases with increase in the temperature due to increase in the extent of inonization. Studies often address resistance by highlighting a case and identifying, explicitly or not, one or more specific factors that explain resistance in that. Examination of major factors affecting voltage variation. Length diameter crosssectional area worked out from this. Knowing how these conditions can change, is the key to designing and building any electric circuit. The scope of the investigation was to find out the factors that affect resistance within a circuit by constructing series and parallel circuits whilst varying the amount of bulbs used. The effects of feed size, undersieve classification, incremental. Resistance is the property of an object, and resistivity is the property of the substance of which the object is made. Electric resistance summary the physics hypertextbook. For pure metals at around room temperature, the resistivity depends linearly on temperature.
But the voltage of the line affects the magnetic field indirectly, because high voltage lines tend to be physically bigger and to carry bigger currents. Resistance is defined as an obstacle to the flow of electric current. Additionally, a voltmeter was connected within to measure the electrical potential difference in volts between two points within the circuit. First i will need to identify the factors that effect resistance. Which are major factors affecting the electrical power quality. As the electrical current moves around the loops of the. Factors affecting resistance of a wire yahoo answers. For example a copper wire has less resistance then a nichrome wire of same length and area of crosssection. Factors that influence electrical resistivity measurements in. Posted on october 3, 2010 october 3, 2010 by john vagabond. Jul 27, 2018 factors effecting the resistivity of electrical materials are listed below temperature. Answer 15 conductance decreases as length increases, all other factors being equal. Factors that affect resistance in an electrical circuit. Examination of major factors affecting voltage variation on.
Mar 01, 2010 resistance is directly proportional to the length of the wire. Factors effecting the resistivity of electrical materials. The factors affecting the resistance r of a wire are. Resistance is a property of a device or a component. Resistance is a measure of the degree to which an object opposes the flow of charges through it.
Taking all the factors in account, this adds another 0. Resistance is directly proportional to the length of the wire. So resistance can be defined as the opposition to current caused by a. Factors affecting electrical resistance free essays. Major factors affecting electricity generation, transmission and distribution in nigeria sule, a. Factors affecting electrical resistance completed lab report. Resistance of a conductor is directly proportional to its length. For this project i want to investigate the factors affecting the resistance of a metal wire. The device which converts electrical energy to heat energy is termed a resistor and its ability to impede current is termed resistance. Metals are good conductors so have lower resistance than an insulator of the same dimensions. Factors affecting electrical resistance completed lab report 2681611 1.
Electric circuits factors affecting voltage, amperage, resistance. The change in the resistivity of material with change in temperature is given by. More the length of the wire, longer is the distance to be covered by the electrons and hence charge thereby reducing current and increasing resistance. This pa per discusses various effects due to environmental factors on electronic and electrical systems. To study the variation of electrical resistance physics. Is the opposition offered by any object to the passage of an electric current through it. Factors affecting the resistance of a wire introduction. Factors affecting the resistance of a wire writework. Resistivity of most of the metals increase with temperature. Temperature the resistivity of materials changes with temperature. In a closed electric circuit, resistance of the components and the voltage of a power source are affecting the electric current. It is not necessary to test each of the factors which affect resistance. Home sources overhead power lines factors affecting the field from a power line voltage magnetic fields depend on the current, not the voltage.