Question

what do you mean by Young's module ,on what factors does it depends

Answer 1

it is measure of stiffness of an elastic material. It is used to describe the elastic properties of objects like wires, rods or columns when they are stretched or compressed.

Tensile Modulus is defined as the

"ratio of stress along an axis to strain along that axis"

It can be used to predict the elongation or compression of an object as long as the stress is less than the yield strength of the material.
young’s modulus depends on following factors:

stress
strain
change of length
elongation
Effect of temperature
Effect of impurities
hope this helps....