10 Question-Answer on elasticity | Learn Physics

10 Question-Answer on elasticity

1.       Gases possess ( as compared to liquids and solids)

(a)    Smallest bulk modulus

(b)   Largest rigidity modulus

(c)    Largest bulk modulus

(d)   All moduli more or less of equal magnitude

Ans: (a)

2.       With rise in temperature, the Young’s modulus of elasticity

(a)    Decreases

(b)   Increases

(c)    Change erratically

(d)   Remains unchanged

Ans: (a)

3.       The Young’s modulus of a perfectly rigid body is:

(a)    Unity

(b)   Zero

(c)    Infinity

(d)   Some finite non-zero constant

Ans:  (c )

4.       The bulk modulus of a perfectly rigid body, is equal to:

(a)    Infinity

(b)   Zero

(c)    Some finity value

(d)   Non-zero constant

Ans : (a)

5.       The shear modulus of elasticity of a liquid is:

(a)    Infinity

(b)   Unity

(c)    Some finite, non-zero constant

(d)   Zero

Ans: (d)

6.       The property of metals which allows them to be drawn readily into thin wires beyond their elastic limit without rupture is known as:

(a)    Malleability

(b)   Ductility

(c)    Hardness

(d)   Elasticity.

Ans: (a)

7.       Solids which break or rupture above the elastic limitare classified as:

(a)    Brittle

(b)   Elastic

(c)    Ductile

(d)   Malleable

Ans:  ( a)

8.       The reciprocal of bulk modulus of a substance is called its

(a)    Compressibility

(b)   Rigidity

(c)    Viscosity

(d)   Modulus of elasticity.

Ans: ( a)

9.       If a metal wire is stretched a little beyond its elastic limit ( or yield point), and released, it will:

(a)    Not contract

(b)   Lose its elastic property completely

(c)    Contract only up to its length at the elastic limit

(d)   Contract,  but its final length will be greater than its initial length

Ans: ( d)

10.   The volume elasticity is possessed by

(a)    Solids only

(b)   Liquids only

(c)    Gases only

(d)   All the three state of matter.

Ans: ( d)