A student recorded the following data for a single resistor while gradually increasing the potential difference across it.
Voltage V (in V): 1, 2, 3, 4, 5
Current I (in A): 0.25, 0.50, 0.75, 1.00, 1.25
(a) Plot V on the vertical axis and I on the horizontal axis on graph paper using a convenient scale.
(b) Describe the nature of the graph obtained from the plotted points.
(c) Using the graph, determine the resistance of the resistor.
(d) Calculate the resistance once again by choosing any two numerical pairs from the table and compare this value with the graphical value obtained in part (c).