electricity.jpg (5852 bytes)

DEPENDENCE OF RESISTANCE ON LENGTH
AND COMPOSITION


EQUIPMENT
    redball.gif (326 bytes) Wire Board
    redball.gif (326 bytes) Low Voltage Power Supply
    redball.gif (326 bytes) Demonstration Meters

  

NARRATIVE
            Resistance is directly proportional to length and dependent on the coefficient of resistance of the material. Connect the a Voltmeter across the Low voltage power supply and an Ammeter in series with the negative side of the circuit.  Connect the positive and negative ends to various lengths and composition of wire.