A4b, a6a: identifying variables and constants the variables in this investigation are voltage (v), resistance (r) and length of nichrome wire (l) resistance and length are directly proportional to each other. An investigation into the resistance of a wire free gcse physics coursework essay 100cm nichrome wire method first, i will collect the apparatus i need and set it up as shown in diagram 1, below i will only change the length of the wire the variables i will control will be the type of wire (resistivity) and the cross-sectional.
Resistance of a wire investigation essay - resistance of a wire investigation aim: to investigate the effects of resistance on a nichrome wire planning my planning will begin with providing a background understanding on the theory of resistance and how it participates in the overall process of the electric current. - investigating resistance of a wire introduction this investigation is about find the resistance of a wire resistance is the slow-down of the flow of an electric current around a circuit so that energy is required to push the charged particles around the circuit. An experiment to find the resistivity of nichrome these collisions slow down the flow of electrons causing resistance resistance is a measure of how hard it is to move the electrons through the wire factors 1temperature: if the wire is heated up the atoms in the wire will start to vibrate because of their increase in energy. Read this essay on investigating the resistivity of a wire come browse our large digital warehouse of free sample essays get the knowledge you need in order to pass your classes and more only at termpaperwarehousecom.
Read this essay on resistivity of nichrome come browse our large digital warehouse of free sample essays investigation of the resistance of a wire the nichrome wire has electrical resistivity of ρe = 10 -6 ωm, thermal conductivity of k = 25 wm-1k-1, and surface emissivity of ε = 020 a assuming negligible temperature variations.
Investigating resistance of a wire essay examples - investigating resistance of a wire introduction this investigation is about find the resistance of a wire resistance is the slow-down of the flow of an electric current around a circuit so that energy is required to push the charged particles around the circuit. The nichrome wire is of 1 metre at 32 gauge and also of 0 5 metre at 28 gauge resistivity is an electrical measure indicating how strongly a material opposes the flow of electric current a low resistivity indicates the material readily allows the movement of electrical charge. Again this resistivity for the 28 gauge in comparison to the resistivity for the 32 gauge is the same, where very small decimal places are slightly out this investigation led to determining a good value for the resistivity by using two wires of different dimensions the accepted value for the resistivity of nichrome is 1 50 i 10-6 m.
The aim of the investigation is to determine the resistivity of nichrome wire at varying dimensions the nichrome wire is of 1 metre at 32 gauge and also of 0 5 metre at 28 gauge resistivity is an electrical measure indicating how strongly a material opposes the flow of electric current. The housing that encloses the coiled wire is at tsur = 50˚c the nichrome wire has electrical resistivity of ρe = 10 -6 ωm, thermal conductivity of k = 25 wm-1k-1, and surface emissivity of ε = 020 a. The resistance of a wire is given by the equation r = ρl / a where ρ is the resistivity of the metal from which the wire is made, l is the length of the wire and a is its cross-sectional area. R = the overall resistance of nichrome wire, the crocodile clips, and the connecting wires c = the overall resistance of crocodile clips and connecting leads overall, i believe that the data provides sufficient evidence to support my theory and conclusions.
To investigate what affects the resistance of a wire variables: need essay sample on investigation of the resistance of a. Resistance of a wire in this experiment you will be making measurements of voltage and current for a piece of metal wire, together with the physical dimensions of the wire, from which you will calculate the resistivity of the metal. Theory suggests that the resistance of a wire is found with this formula: r= l/a r = resistance = resistivity of wire l = length of wire a = cross-sectional area i will now perform an investigation to confirm the legitimacy of this formula and confirm a value for in a nichrome wire.
It does not pass trough as easily in a thin nichrome wire of an electric fire element this wire has much more resistance energy has to be spent to force electrons through it and heat comes off as a result all conductors have some resistance but: long wires have more resistance than the short wires.