Which of the following is incorrect regarding Searle's apparatus method for finding…
PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
Which of the following is incorrect regarding Searle's apparatus method for finding Young's modulus of a given wire?
(1) Average elongation of the wire is determined for a particular load while increasing and decreasing the load.
(2) The reference wire is just taut, and the experimental wire undergoes elongation.
(3) The air bubble in the spirit level is displaced from its central position due to the relative displacement between the wires caused by elongation.
(4) Average elongation of the wires is determined by increasing the load attached to both wires.