In the given Fig. 7(CF).2, if the dimensions of the two wires are the same and materials are different, Young's modulus is

Options

A. more for A than B
B. more for B than A
C. equal for A and B
D. none of the above

Answer

A

Explanation

As, `F=(YA)/(l)Delta l`, therefore the graph of F versis `Delta l` is a straight line with slope `(YA)/(l)`,i.e.,
Slope of graph`prop` Young's modulus(Y)
As, `(slope)_(A) gt (slope)_(B)` `:. Y_(A) gt Y_(B)`