Question

With rise in temperature, the Young's modulus of elasticity:

• A. Changes erratically
• B. Decreases
• C. Increases
• D. Remains unchanged

Hint:

Young's modulus decreases with temperature because increased thermal energy makes materials more ductile.

Answer 1

The Correct Option is B

Step 1: {Young's modulus definition} 
\[ Y = \frac{{Stress}}{{Strain}} \] 
Step 2: {Effect of temperature increase} : As temperature increases, strain increases, leading to a decrease in Young’s modulus.  
Thus, the correct answer is Young’s modulus decreases.