Exp-1 To investigate the elastic and plastic extension of metal wires.
Principle and Working:
The ratio of the normal stress to the longitudinal strain is called Young's modulus of elasticity. If a wire of length 's' and area of cross section 'a' be stretched by a force F and if a change (Increase) of length Δs is produced, then
Normal stress =F/a, Longitudinal strain, ε= Δs /s
Modulus of elasticity, E= Normal stress/ longitudinal strain.
In the present setup the extension produced is magnified by 40 times for easy observation on a pointer scale.
|Cat. No.||Item Name||Qty.|
|C9808||Rod, 25 cm||2|
|C2942||A’ shaped base, small||2|
|SP640||Cu wire, 34 SWG||1|
|SG436||Constantan wire, 34 SWG||1|
|C9810||Pulley with 4mm plug||1|
|SW088||Double hooked mass 50g||24|