Write down the sequence of actions that need to be performed in order to experimentally measure the specific resistance of the substance from which the proposed wire is made. Give all the necessary formulas for this. Select the measurement results as follows. so that it follows from them that the wire is copper.
1. Measure its diameter with a micrometer in several places of the working part of the conductor. Calculate the average value of the diameter.
2. Measure the length of the conductor with a micrometer several times. Calculate the average length.
3. Connect the unit to the 220 V alternating current network.
4, Carry out current and voltage measurements.
5, Calculate the resistivity of the conductor.
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