On your first day at work as an electrical technician, you are asked to determine the resistance per meter of a long piece of wire. The company you work for is poorly equipped. You find a battery, a voltmeter, and an ammeter, but no meter for directly measuring resistance (an ohmmeter). You put the leads from the voltmeter across the terminals of the battery, and the meter reads 12.1 . You cut off a 20.0- length of wire and connect it to the battery, with an ammeter in series with it to measure the current in the wire. The ammeter reads 6.50 . You then cut off a 40.0- length of wire and connect it to the battery, again with the ammeter in series to measure the current. The ammeter reads 4.50 . Even though the equipment you have available to you is limited, your boss assures you of its high quality: The ammeter has very small resistance, and the voltmeter has very large resistance.
What is the resistance of 1 meter of wire?