Page 3 - HA CH 11 CLASS XI
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(a)    A has largest length
                           (b)    D has largest length
                           (c)    C has largest length
                           (d)    B has largest length



                   17. State Hooke’s Law. Also plot the stress –strain curve for a metal showing the different regions (i)
                       elastic limit (ii) Permanent set (iii) Yield point (iv) Permanent set
                   18. Define Young’s Modulus of elasticity. What is the unit of measurement of Modulus of elasticity?
                       Derive the formula to find the Young’s Modulus of elasticity.
                   19. Define rigidity modulus of elasticity. Derive an expression to find the same.
                   20. What is meant Bulk Modulus? Write the expression for finding the Bulk modulus. What is the
                       significance of negative sign in the expression for Bulk Modulus? How is it related to
                       compressibility?
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