How do you calculate the resistance of a wire by plotting a graph of V and I ?

Table of Contents
    Resistance of a wire
    Resistance of a wire- circuit diagram
    Resistance of a wire – Experimental setup
    • Connect the ammeter in series with the circuit wire and the voltmeter in parallel with the wire.
    • Note the zero error of the metres.
    • Calculate the least count of the metres.
    • Switch on the circuit.
    • Set the rheostat to a particular position and record the readings of the ammeter and voltmeter.
    • Repeat steps 5 and 6 for different settings of the rheostat.
    • Tabulate the readings.
    • Calculate the resistance of the wire using the formula R=V/I
    Least count of microammeter
    Least count of voltmeter
    Resistance of a wire – Tabular column

    Resistance of a wire – V – I graph

    Resistance of a wire – Graphical method

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