Answer to Question #291618 in Electricity and Magnetism for Mama

Question

When a copper wire with a cross section of 1.5mm^2 was tensioned , permanent set was observed to begin at a force of 4.5N.What is the elastic limit of the wire material?

Answer 1

The elastic limit of the wire material:

$$\sigma_e=\dfrac FA=3·10^6\text{ Pa}.$$