The change of resistance through various lengths of wire.

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…went to more than two decimal places may also have helped this problem. Without knowing it, there may have been a large difference between the real answer, and the answer the ammeter I used gave me. For instance: 0.095A, 0.10A - 0.100A, O.104A. However, changing the variable resistor would have made no difference. A computer may have been able to get extremely precise readings, and this would have been better than the ammeter used.