A set of potential difference–current readings for a certain resistor kept at room temperature is given below:
Potential difference V (V): 2.0, 4.0, 6.0, 8.0, 10.0
Current I (A): 0.20, 0.40, 0.60, 0.80, 1.00
(i) Plot a graph of V on the y-axis versus I on the x-axis using a suitable scale.
(ii) From the graph, determine the resistance of the resistor.
(iii) For each operating point listed in the table, calculate the electrical power dissipated.
(iv) Using your results, identify the operating point that corresponds to the maximum power and state this power value.
(v) Comment on how the power would change if the resistor were replaced by another one whose resistance is half the value found in part (ii), while keeping the same range of supply voltages.