Two cylindrical resistive elements, A and B, made of different materials but having identical dimensions, are tested separately at 20∘C. For each element the potential difference across it is varied, and the resulting current is measured. The following information is extracted from the respective I–versus–V plots:
• For element A the straight–line plot passes through points (I=0.25A,V=1.0V) and (I=1.00A,V=4.0V).
• For element B the straight–line plot passes through points (I=0.10A,V=1.5V) and (I=0.40A,V=6.0V).
Throughout the experiment both elements remain ohmic and do not change temperature.
(a) Without performing calculations, state which element has the greater resistance and explain your reasoning using the concept of slope.
(b) Calculate the numerical value of the resistance for each element from the information provided.
(c) The two elements are connected in parallel to an ideal 6.0V power supply. Determine the total current drawn from the supply.
(d) The same elements are instead connected in series to a 6.0V supply. Determine the potential difference across element A under these conditions. Show all steps in your reasoning.