Question

2.What is the SI unit of Young’s modulus

of elasticity?

A. Henry

B. Hertz

C. Pascal

D. Dioptre​

Answer 1

Ans. C

Sol. Young's modulus of elasticity is the

ratio of longitudinal stress to

longitudinal strain. Stress has units of

pressure and strain is a

dimensionlessquantity and so Young's

modulus has units of pressure. Its SI

unit is therefore Pascal.