Wire | Length | Diameter | Materials | Resistances |
A | 2d | Aluminium | ||
B | d/2 | Constantan | ||
C | d/2 | Constantan | ||
D | 3d | Copper | ||
E | 2d | Aluminium | ||
F | 4d | Copper |
Answer:
(a)
Wire C has maximum resistance because it has maximum length, least thickness
and highest resistivity. (1)
(b) Wire F has the minimum resistance since it has least length, maximum
thickness and least resistivity
(c) (using relation and comparison).
(1)
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