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B5 practical: Factors affecting R (nichrome)

In this practical the resistance of samples of nichrome wire will be measured with a multimeter and the resistivity of nichrome calculated.The resistance of a cylinder of metal is given by the formulaR=ρL/AWhere R= Resistanceρ = ResistivityL = LengthA= Cross sectional areaConnect two leads to the multimeter, there are usually 3 sockets on a multimeter, make sure you connect to "com" and Ω. The resistance of the wire...

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