How do we calculate resistance in a VI Graph and in a IV Graph.. can we use slope of the graph.. if yes show it in terms of both the graphs
Answers
Most students do not know how to plot a graph between two variables. For example, perhaps you also do not know which quantity is to be plotted along X-axis and which along Y-axis.Remember a rule of thumb;Plot INDEPENDENT quantities along X-axis while plot DEPENDENT quantities along Y=axis. Thus if you need plotting a graph between distance covered by a car VS time, here time is taken along X-axis while the distance covered by car along Y=axis. Reason? Time is independent of the distance, will flow continuously whether the car is in motion or not but distance would depend upon the time and hence is dependent quantity.
In your question. current I depends upon voltage V or PD applied .Therefore , V is taken along X-axis and I along Y-axis the slope( V/I ) gives resistance R. You may call this graph as V-I or I-V, basically it does not matter.