A graph is plotted between extension and load. The first two readings do not fall on the straight line whereas almost all the readings taken there after fall on a straight line. What is the main reason behind it?

Question

A graph is plotted between extension and load. The first two readings do not fall on the straight line whereas almost all the readings taken there after fall on a straight line. What is the main reason behind it? (A) The wire gets heated up during the course of the experiment. (B) Initially the wire was not free from kinks. (C) In the initial state the wire has less elasticity as compared to later stages. (D) The wire has some plastic deformation in the later stages.

Tardigrade Admin · Accepted Answer

Correct answer is (b) Initially the wire was not free from kinks.

Q. A graph is plotted between extension and load. The first two readings do not fall on the straight line whereas almost all the readings taken there after fall on a straight line. What is the main reason behind it?

The wire gets heated up during the course of the experiment.

Initially the wire was not free from kinks.

In the initial state the wire has less elasticity as compared to later stages.

The wire has some plastic deformation in the later stages.

Correct answer is (b) Initially the wire was not free from kinks.