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In an experiment to determine the strength of electromagnet, the weight of pins that can can be supported by the electromagnet, was recorded against the number of turns. The current was kept constant throughout the experiment. The table below shows the data obtained.
i).Plot a graph of weight W against the number of turns, n.
ii).Use the domain theory to explain the nature of the curve.
iii).Sketch on the same axes, the curve that would be obtained using a higher current.