Grade 9 Science Exam Review 2014 | Page 18

10 a) The following data was collected by measuring the potential difference across a light bulb and the current through the same bulb. Given the values in the table draw a potential difference versus current graph: Potential Difference (V) 0 3 9 15 Current (A) 0 4.5 13.7 22.7 20 V 15 V Volts(V) 10 V 5V Current (A) 25A b) Calculate the slope of the graph: m = V/I c) The slope of the graph represents the _________________ Page 18 of 18