To demonstrate that the stress is proportional to the strain in a wire under load.
- Young's modulus apparatus
- Set of weights
- Retort stand
- G clamp
- Micrometer and metre trule
Young's Modulus Apparatus and Diagram.
Two wires of the same material are suspended side by side from the same support. The main scale is kept taut by the weight L. The extension of the wire for different loads is obtained from the vernier. The unextended length and the diameter of the wire are also measured using the rule and micrometer. Young's modulus can be found from the gradient of the graph and the measured data.