Question

For most materials the Young’s modulus is n times the modulus of rigidity, where n is

• A. 2
• B. 3
• C. 4
• D. 5

Answer 1

Answer: (B)

3

Answer 2

: For most materials, the modulus of rigidity is one-third of the Young’s modulus.

$\eta = \frac{1}{3}YorY = 3\eta$

$\therefore n = 3$