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Effect of Temperature on resistance Observations Here are the results of the investigation. First Set Temperature /oC Voltage /V Current /mA Current /A Resistance /? 0 1.02 1.12 0.00112 911 10 0.97 1.80 0.00180 539 20 0.97 2.60 0.00260 369 30 0.93 3.80 0.00380 245 40 0.9 5.40 0.00540 167 50 0.88 7.70 0.00770 114 60 0.87 11.0 0.0110 78.2 70 0.85 16.5 0.0165 51.5 80 0.82 20.0 0.0200 41.0 90 0.79 22.0 0.0220 35.9 100 0.77 28.0 0.0280 27.5 Second Set Temperature /oC Voltage /V Current /mA Current /A Resistance /? 0 1.02 1.40 0.00140 729 10 1.00 1.90 0.00190 526 20 0.980 2.40 0.00240 408 30 0.980 3.40 0.00340 288 40 0.930 4.20 0.00420 221 50 0.920 6.00 0.00600 153 60 0.890 10.8 0.0108 82.4 70 0.880 19.4 0.0194 45.4 80 0.830 21.0 0.0210 39.5 90 0.800 22.1 0.0221 36.2 100 0.780 26.3 0.0263 29.7 Average Temperature /oC Voltage /V Current /mA Current /A Resistance /? 0 1.02 1.26 0.00126 820 10 0.985 1.85 0.00185 532.5 20 0.975 2.5 0.0025 388.5 30 0.955 3.6 0.0036 266.5 40 0.915 4.8 0.0048 194 50 0.9 6.85 0.00685 133.5 60 0.88 10.9 0.0109 80.3 70 0.865 17.95 0.01795 48.45 80 0.825 20.5 0.0205 40.25 90 0.795 22.05 0.02205 36.05 100 0.775 27.15 0.02715 28.6 This investigation was carried out as accurately as possible. Firstly, the only variable being changed was the temperature of the water in the beaker, and it was very important to regulate that temperature, making it rise steadily. To make sure that the thermistor was at the correct temperature, it was important to position it correctly in the beaker. I made sure that it was not at the bottom of the beaker, as that would be heated directly by the bunsen burner, so I put the thermistor about half way up the beaker. More obviously, I made sure that the two wires going into the thermistor did not cross, as that would short-circuit the circuit. I put the thermometer at the same level...

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