Two wires X and Y made of the same material and of equal length were tested. The following readings were obtained:
V (V)
I in X (A)
I in Y (A)
1
0.05
0.025
2
0.10
0.050
3
0.15
0.075
4
0.20
0.100
Use the data to answer the questions that follow.
(i) Draw separate V–I graphs for wires X and Y on the same axes. From the graphs or otherwise, determine the resistance of each wire.
(ii) Which wire has the larger cross-sectional area? Justify your answer.
(iii) The two wires are connected in series to a 12V source. Calculate the current flowing in the circuit.