Young's modulus of steel is Y and its rigidity modulus is `eta`. A piece of steel of cross-sectional area A, is stretched into a wire of length L and area of cross-section `(A)/(4)`, In wire case

Options

A. Y increases and `eta` decreases
B. Y deceases and `eta` increases
C. Both Y and `eta` do not change
D. Both Y and `eta` are increased

Answer

c

Explanation

Both Y and `eta` depend upon the material of the wire. They are not changed by the changes in dimensions. Hence, Y and `eta` do not change.