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Title: Resistance Investigation

Essay Details

Subject: History
Author: Richard E
Date: July 3, 2016
Level: University
Grade: B
Length: 2 / 512
No of views: 0
Essay rating: good 0, average 0, bad 0 (total score: 0)

Essay text:

Hence, the factors are: * The thickness of the wires: 1, 2 , 3and 4 mm in diameter * The length of the wires: 25, 50 , 75and 100 cm long * The material of the wires: copper, iron, constantan and nichrome * There will be 16 tests to be carried out The experiment will require both the readings of voltage and current in order to produce the value of resistance according to the formula: R = V/I ?? (Resistance is measured in Ohms) The power supply, however, is varied between 0-12V with 1V interval so that a series of results can be obtained with the single factor altered: a graph of V against I can be drawn and an average resistance can be produced in this case, rendering it a fairer test...

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Since each test does not take long, the tests can also be repeated to obtain a more accurate mean. DC supply is used so that the voltage and current are not fluctuating while a steady reading is needed to be obtained. To make it a fair test, only one factor should be altered at a time. When the material of the wire is being tested, the length and the diameter of the wires should be the same at 1mm wide and 25cm long...

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