4: verifying ohm's law and measuring specific resistance (resistivity) objectives: 1 measuring the voltage and the current on four constantan wires with different cross-sectional areas 2 measuring the voltage and the current on two constantan wires with different lengths 3 measuring the voltage and the current on a. As part of aqa's commitment to assist students, aqa may make your coursework available on a strictly anonymous basis to teachers, examining staff and in the unlikely event that your coursework is made available for the purposes stated above, you may object to this at any time the resistivity ρ of constantan [2 marks. Constantan is a copper–nickel alloy also known as eureka, advance, and ferry it usually consists of 55% copper and 45% nickel its main feature is its resistivity, which is constant over a wide range of temperatures other alloys with similarly low temperature coefficients are known, such as manganin (cu86mn12ni2. Physics coursework evaluation for the resistance of a wire -the essays of warren explore the physics this equation shows that the resistance of a wire is directly proportional to the length of optometry school admission do i list high school on resume case study help science resistance of constantan wire. In the experiment a metal called constantan was used and the resistance of a 22 swg constantan wire is 50 times smaller these numbers are very similar in my research it said that the resistance of the wire and its area were inversely proportional and my results confirm this the graph of (1/area) against. Resistivity and temperature coefficient at 20 c material resistivity ρ (ohm m) temperature coefficient α per degree c conductivity σ x 107 /ωm ref silver 159 x10-8 0038 629 3 copper 168 x10-8 010 1 constantan 49 x10-8 020 1 carbon (graphite) 3-60 x10-5 -0005 1 germanium 1-500 x10-3.
Category: papers title: investigating how the resistance of a constantan wire is affected by its length essay on investigating the resistance of a wire - investigating the resistance of a wire aim: i am going to investigate what factors affect the resistance of a wire here are some main factors which may affect the. The following apparatus should be available for class use: selection of reels of eureka wire (also known as constantan or contra) of different gauges, eg 071 mm (22 swg), 046 mm (26 swg), 032 mm (30 swg) and 024 mm (34 swg) selection of reels of different wires (eg copper, eureka, iron) of same gauge ( eg. All these materials should have high resistivity, low temperature coefficient of resistance, high melting point, high ductility, high mechanical strength and no tendency for oxidation common examples of high resistivity materials are manganin (copper 86%, managanese 12% and nickel 2%), constantan (copper- nickel alloy),.
Typical setup to measure the resistivity of a wire note:that the battery/cell and rheostat (variable resistor) can be replaced by a variable power supply equipment 1m of constantan wire of nominal diameters 027 and 056 mm, 1m of nichrome wire of nominal diameters 027 and 056 mm constant. Explore mechanical properties of materials such as density, tensile strength, hardness, electrical properties such as conductivity, optical properties to 30 swg nichrome, 30 swg constantan, sellotape, wire cutters) this experiment is essential preparation for the quality of measurement coursework task. Discursive essay meaning · academic writing tips research papers · websites for hindi essays · storage area network research paper · essay visual aids essays · sarah roney post columbine essay · business plans for dummies · write about education essays · health careers essays · resistivity of constantan coursework.
Can transmit an electrical current high values of resistivity imply that the material is resistant to the flow of electricity and low values of resistivity imply electrical current is transmitted easily the derived formula comes from the formula for resistance, r=v/i, incorporating resistance (r), resistivity (ρ), cross- sectional area (a. Resistance in a wire free essay example: how the resistance of a wire is affected by its length this investigation will determine how changing the length of the wire, when passing an electrical current through it, will effect its resistance resistance- “the property of failing to conduct electricity or thermal energy” introduction.