Ohms Law
...the current were recorded as the voltage went up by one. The resistance was then calculated by dividing the voltage by the current (R=V/I). Results Using a Light Bulb P.DV/V CurrentI/A ResistanceR/ (V/I) PowerP/W 0 0 1 0.50 2 0.5 2 0.65 3.1 3 0.79 3.8 4 0.90 4.5 5 1.00 5 5 6 1.10 5.5 7 1.19 5.9 8 1.27 6.3 9 1.34 6.7 10 1.41 7.1 14.1 We can see from the above table that there is no direct relationship between the voltage and current. Although increasing the voltage does increase the resistance of the light bulb but this is only because the temperature rises and the bulb gets hot. Therefore the bulb does not obey Ohms Law. We can also recognize this from the power. Using a Resistor P.DV/V CurrentI/A ResistanceR/ (V/I) PowerP/W 0 0 1 0.10 10 0.1 2 0.20 10 3 0.30 10 4 0.40 10 5 0.50 10 2.5 6 0.60 10 7 0.70 10 8 0.80 10 9 0.90 10 10 1.00 10 10 As you can see from these results of the resistor, the voltage is directly proportional to the current and t...