Question

Assertion :Up to elastic limit of a stress-strain curve, the steel wire tends to regain its original shape when stress is removed. Reason: Within proportional limit, the wire follows Hooke's law.

• A. Both Assertion & Reason are true and the reason is the correct explanation of the
  assertion
• B. Both Assertion & Reason are true but the reason is not the correct explanation of
  the assertion
• C. Assertion is true statement but Reason is false
• D. Both Assertion and Reason are false statements

Answer 1

The correct option is B Both Assertion & Reason are true but the reason is not the correct explanation of

the assertion
$\begin{array}{c}\text{Upto}b\text{wire regain its original shape and upto}\\ \text{point a wire followe Hookis law, i.e. stress is proportional}\\ \text{to strain.}\end{array}$

$\begin{array}{c}\text{Both assertion and reason are tor true but}\\ \text{reason is not correct explanation of cussertion. Hence, option B}\end{array}$