Question

Which modulus of elasticity determines stretching in the coiled spring?
a) Young s modulus
b) Bulk modulus
c) Modulus of rigidity

Answer 1

B one is your answer

Answer 2

Heya Friend !!

The elasticity involved in this is shear ,i.e, rigidity since the shape changes is determined by shear modulus . Therefore, modulus of rigidity determines the stretching of a coiled spring .

Hence , option c) is correct .