Physics Experiment
EXP01 - Determination of Young's Modulus of a Wire using Searle's Pattern
Young's Modulus of Wires Apparatus, Searle's Pattern
Slotted Weight Set
Micrometer Screw Gaugeg
Principle
Within elastic limit, extension of a wire is directly proportional to applied force. Young’s modulus is given by Y = (FL)/(AΔL), where F is applied force, L is length, A is cross-sectional area, and ΔL is extension.
Young's Modulus Formula
Y = (FL) / (AΔL)
Theory
When a force is applied to a wire within its elastic limit, the wire undergoes a small extension proportional to the applied load. This behavior follows Hooke’s law. By measuring the extension produced in a wire of known dimensions under different loads, the relationship between stress and strain can be studied and Young’s modulus of the material can be determined.
Topics Covered
Stress and Strain
Hooke's Law
Young's Modulus
Elasticity