Question

Read the following information:
(i) Resistivity of copper is lower than that of aluminium which, in turn, is lower than that of constantan.

(ii)Six wires labelled as A, B, C, D, E, F have been designed  as per the following parameters:

Answer the following questions using the above data:
(a) Which of the wires has maximum resistance and why?
(b) Which of the wires has minimum resistance and why?
(c) Arrange R₁,R₃ and R₅ in ascending order of their values. Justify your answer.

Answer 1

(a) Wire C has maximum resistance because it has maximum length, Ieast thickness and highest resistivity.
(b) Wire F has the minimum resistance since it has least length, maximum thickness and least