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 formula R=ρL/A Where R= Resistanceρ = ResistivityL = LengthA= Cross sectional area Connect 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...