YOUNG’S MODULUS WIRE APPARATUS, SEARLE’S TYPE

  • It is used for elastic deformation measurement and for calculating Young’s modulus of elasticity of wire material.
  • It is a specially designed apparatus, which is capable of greater degree of sensitivity and accuracy.
  • It consists of two cast metal rectangular frames hinged together and parallel to each other to allow only vertical relative motion, with a spirit level fixed on a cross-bar pivoted across the frames for noting the reference point.
  • One frame has a vertical scale, 10-0-10mm with a micrometer head along it reading to 0.01 mm for adjusting the spirit level.
  • Each frame has a self-centering chuck at its top for holding wires and load hooks at the bottom.
  • Also included is a ceiling bracket carrying a pair of chucks, a counterpoise weight and a set of two wires, one each of brass and steel.
  • The relative displacement between the two frames can be known from the micrometer reading after adjusting the bubble of spirit level.
  • It is supplied in a case.
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