The purpose of this lab is to determine how long the cable that separates the battery source and load can be. In the image, the white box is our battery supply. The tiny thing in the middle is our load which has a resistance of about 1000 ohm. The yellow box is a resistor box which represents our cable line. The multimeter on the left is a voltage meter that checks the voltage across load resistor. The multimeter on the right is a current meter across the circuit. The way we do it is to set the battery to 12V and keep increasing the resistance of the resistor box to get the minimum voltage that load still can work. Then we have the maximum number of the resistance of the cable. Therefore, we are able to determine how long a cable line could be.
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