Investigation Into the Resistivity of a Wire Aim: The aim of this investigation is to see how the length of Nichrome wire affects its resistance Pre-test Results: Wire Type Swags Length of Wire (cm) Voltage (v) Current (a) Resistance (Ω) Constantan 26 10 20 40 13.5 27.5 56.4 0.4 37.5 687.5 1410 Copper 26 10 20 40 0.9 1.5 2.5 0.4 22.5 37.5 62.5 Nichrome 26 10 20 40 32
Measuring the Resistivity of a Wire Aim The aim of this experiment is to find out how the area of the cross section of the wire affects the resistance and also to find out the resistivity of the wire having found the resistance over a certain length and using a certain cross sectional area. I will also experiment to see how the length of the wire affects the resistance. Plan The first thing that I will do is to set up the apparatus as shown below. A,V Except for the experiment
There are many problems that would require a geologist to solve ranging from erosion of the soil, volcanic activity, seismic faults, rocks and plate tectonics and why the continents are moving, sinkholes and many others. One current problem that I have witnessed and read about from multiple sources is about sinkholes. In the past few years there have been many occurrences where sinkholes are occurring and causing a huge amount of damage to the environment; and have also cause many casualties. Sinkholes
Investigating the Factors that Affect the Resistance of a Wire Aim To study the factors which affect the resistance of a wire. Background Information Although current and potential difference measure different things, they are related to each other. In 1826, Georg Ohm discovered that doubling the p.d. doubled the current. (Taken from Ohm's Law: the current flowing through a metal wire is proportional to the potential difference across it (providing the temperature is constant)
alsowhich are occasionally used. Electrical resistivity quantifies how strongly a specific material opposes the flow of electric current. Electrical resistivity is commonly represented by the Greek letter ρ (rho). The SI unit of electrical resistivity is the ohm⋅metre (Ω⋅m) although other units like ohm⋅centimetre (Ω⋅cm) are also in use. There are formulas to calculate electrical conductivity and resistivity. Conductivity is defined as the inverse of resistivity (a high conductivity means a low resistance)
will need to identify the factors that effect resistance. There are a few factors that affect the resistance, it is determined by the properties an object has. This is know as resistivity. The factors I can investigate are : Ÿ Temperature Ÿ Length Ÿ Cross-sectional area/width Ÿ Material (resistivity) The factor I shall investigate is the length of a wire. Background Knowledge Resistance is when electrons travelling through the wire are impeded by the atoms within the
Factors Which Affect the Resistance of a Wire To start off this experiment I feel that it is suitable to explain the main facts of this study. Below is a section explaining the resistance in detail. Facts on Resistance: I have shown how resistance occurs. · WIRE · ATOMS · ELECTRONS Resistance occurs when the electrons traveling along the wire collide with the atoms of the wire. These collisions slow down the flow of electrons causing resistance. Resistance is a
losses in the cable's metallic conductors. Temperature also has effects the resistivity of the conducting surface. Resistivity is a "bulk property of material describing how well that material inhibits current flow. This is slightly different from resistance, which is not a physical property. If one considers current flowing through a unit cube of material (say, a solid metal cube that measures 1 meter on each side), resistivity is defined as the voltage measured across the unit cube length (V/m) divided
Science Coursework The Resistance of a Wire Aim: To find out how the length of a wire affects the resistance of it. Knowledge: Ohms Law is a mathematical equation that shows the relationship between Voltage, Current and Resistance in an electrical circuit. It is stated as: , V = I x R , R = V / I , I = V / R Where · V = Voltage · I = Current (I stands for INTENSITY) · R = Resistance In order to understand what Ohms Law is all about you need to understand electricity
Source - (Obtained in A-level PHYSICS by Roger Muncaster. Page 536.) The electrical resistivity of a material is defined by R= ÏL/A Where · R = Resistance of some conductor(Ω) · L = Length of the conductor(m) · A = Area of cross - section of the conductor (m²) · Ï = the resistivity of the material of which the conductor is made (Ωm) The experimental determination of the resistivity of a material involves measuring the resistance of a specimen of the material. The specimen
What am I going to research? In this case study, I am going to research what resistivity is and how a resistivity survey works using the physics principles. I am also going to explore what benefits this technique might bring, but also what flaws there could be. Additionally, I am going to explore a famous historical use of this method. What is resistivity? Resistivity is the oppose to conductivity. It's a measure of material's ability to oppose the flow of electric current. It is a property of the
How Thickness and Length Affect the Resistance of a Wire I plan to investigate how the length and thickness of a wire affects the resistance. I plan to do this by keeping the voltage the same by using a variable resistor and measure the current when varied lengths and thicknesses of wire is in a circuit ===================================================================== Variables ========= There are a few factors that can affect the resistance. These are; * Temperature
The Length of a Wire Affects Its Resistance Scientific Enquiry: I know that metals are good conductors of electricity. Metals are good conductors because their electrons are easily released allowing electricity to flow. The electrons can carry current because they split up from the positive ions, so they are free to move and to carry current. Factors that affect resistance: 1. Length – the longer the wire the more atoms there are for the current to push through. 2. Width –
The Relationship Between the Length of Constantan Wires in a Circuit and the Current Aim To investigate the relationship between the length of constantan wires in a circuit and the current flowing through. Introduction ============ In a conductor electrons are able to jump between atoms. However in insulators they remain around a single atom unable to move. Constantan, a metal, unlike most other metals is a poor conductor although it is also a poor insulator. Being a metal it
Resistance of a Wire Introduction Resistance is the opposition a material offers to the flow of electricity. The electrical resistance of an object is not only by what material it's made of, but also by its shape. A very thin copper wire has more resistance than a thick copper wire of the same length. A very long copper wire has more resistance than a short one of the same thickness. Resistance is measured in Ohms. Variables There were three variables that our group was able to choose
Rt water and true resistivity Yao and Holditch (1993) introduced a method to calculate permeability using well log data in tight formations. The model involved porosity, deep and shallow resistivity, and GR (Eq. 2.19) and showed a moderate to strong correlation with core permeability, R2 > 0.7. K=(∅^e1 (〖1-IGR)〗^e2 Rild^e3)/((〖Rild/Rsfl)〗^e4 ) Equation (2.19) Where, IGR is gamma log index and Rild,Rsfl are deep ,shallow resistivity. Saner et al.
dielectric constant for the material. The surface resistivity of the material is τ=ερ The decay time can be also be used to measure the resistivity of the material. Materials can be classified based on their surface resistivity. Surface resistivity has the dimensions of ohms per square. The resistivity will be the same no matter what size the square is. Two electrodes that form the opposite sides of a square can be used to measure the surface resistivity. The resistance will be the same regardless
Electrical Resistance Electrical resistance is a property of an electrical circuit that opposes the flow of current. Resistance involves collisions of the current-carrying charged particles with fixed particles that make up the structure of the conductor. Resistance is often considered as localized in such devices as lamps, heaters and resistors in which it predominates, although it is a characteristic of every part of a circuit, including connecting wires and electric transmission lines
Dielectric parameters measured in the frequency range of 10Hz to 10MHz at room temperature were shown in respective figures. The measure of the ability to store electric charge is called as Dielectric constant. Figure_____ shows the variation of dielectric constant with frequency. It is evident from the figure that with increase in frequency, the dielectric constant has decreased and finally attains constant value at higher frequency. The decrease in dielectric constant in lower frequency region
whereas meteorites that collects ... ... middle of paper ... ...y value > 6000 ohm-m. Granitic bedrock with >20000 ohm-m recorded in the second zone. The image of the 2-D resistivity also shows that the fractures and fault do occur in granitic bedrock and some poor rock quality region. Fractures frequency and electric resistivity at the Lockne meteorite site located in Sweden was studied. The aim of the survey is to define the extent and radial changes of impact induced fracturing. Conduct of studies