Question

The stress-strain diagram for two materials A and B are shown here. Select the correct option.

• A. '$A$' has greater Young's modulus than '$B$'
• B. '$B$' has greater Young's modulus than '$A$'
• C. '$A$' & '$B$' has same Young's modulus
• D. Cannot comment

Answer 1

The correct option is A '$A$' has greater Young's modulus than '$B$'

Slope of stress - strain curve within the elastic limit gives the Young's modulus.
It can be clearly seen that
$(slope{)}_A$ > $(slope{)}_B$
So, Young's modulus of $A$ is greater than Young's modulus of $B$.